#help-36
1 messages · Page 232 of 1
you have to correct where ur axis is placed in terms of direction
to get the right 1,1,1
now u can argue, that in a world with no other object, not even points
this can be useless
but in a world (3d btw) with any other object (if we forget there are infinite points already and objects aren't necessarily required)
this is required, the correct direction to understand the correct location of the point is required
even with the same 0,0,0 or origin
now y'all can talk
ok so you have two problems essentially
a, teeny tiny, super tiny, side note: you can't just say "well it's, 6,1,2 in your axis direction when it's 1,0,0 in my axis direction
alright go ahead.
Well, if we have a fixed coordinate system, then we can describe the location of each point exactly. Of course if you twist the axes or swap them, change them or sth like that, you change the whole system, which was ought to be fixed.
If we wanna communicate position of certain points, we have to agree beforehand on one common coordinate system, with oriented and labelled axes which we will both use.
A good example of this (although not a cartesian system) is the earth and the latitude-longitude coordinates. If I tell you some coordinates, you'll know exactly where on earth they are. Because we agreed on the coordinate system beforehand
TL;DR, you have to fix a coordinate system and not change it, then the coordinates will work
if at all
you have a intuition of how 3 dimensional spaces work, and how linear "twisting" works
you'd understand why I didn't "change" anything
when I changed the direction of axises
So, for me to explain more clearly
I do not have a vengeful intention behind changing this
and I completely agree with u that we need to have a defined co ordinate system
you'll later understand that's what I'm tryna argue for
but
the literal intention behind me showing you that I changed it is
the fact that you.... say it with me... CAN
change it
but.. i) you are unsure how to define the coordinate axes such that the point the examiner calls to be at (1, 1, 1) matches with what YOU have defined
when u give this system without a concrete direction
over here, all u gave was which point was 0,0,0 and u gave me basis vectors
and then u gave me a point to locate, 1,1,1
you yourself admitted that changing the axes doesn't actually change anything. so as long as people agree to your axis directions it doesn't matter what the "true" axes are, assuming you're looking for some sort of universal basis
god forbid this mis understanding
that is, you argue that there are infinite possible ways to define the basis vectors, and therefore you are not sure how the grid would actually look like
god forbid this mis understanding again
alright
we're back to two minutes of no talking pls
it's unnecessarily restrictive to want to look for some true established coordinate system, the freedom to change coordinates are useful in all sorts of math
to put this into a nutshell, and not confuse u if I actually did something called "changing it"
I was trying to show you, that;
If you give me a point and call it 0,0,0 as the origin, and if u give me basis vectors 1,0,0 - 0,1,0 and 0,0,1 for example.
and then ask me to locate or "talk" about a point 2,0,0
then I am ABLE to show 2 different representations
like the ones I showed in the picture
{ SAME basis vectors, SAME origin, JUST twisted the directions of x, y axises WITHOUT any hinderance in the question }
I am trying to show u that
but you have seemed to rotate the axes
it follows from the definition of a basis for a space that any point in that space is uniquely representable in that basis
which is essentially just changing the basis vectors
alright so I'm trying to show u that
the axes are a representation of the basis vectors
one more minute of silence please
what you're saying here is "same basis vectors, you're just twisting and changing the basis vectors"
pls one more minute of silence
Just let him cook
what I'm trying to show right now
-# Let the kitchen burn
is not that " Hey, u gave me an answer, I twisted it and look I got a different answer"
what I'm trying to show right now is
" Hey, you gave me a process to find an answer... but why does it look like I can reach two answers with the same process "
all of u who have doubts regarding me "changing it all"
please calibrate over this
for a good 2 minutes of ur life
I did not change anything
I ended up with an answer
with the same conditions y'all set
and I ended up with a different, perfectly right answer
that's what I'm tryna show
it's self contradictory therefore you need an absolute direction for x, y and z axis in terms of a line equation of where they are
to actually locate a point
^^^
Okay, if we talk concretely, I fixed origin (0, 0, 0) at London's ground. My basis vector (1, 0, 0) goes to Birmingham and (0, 1, 0) goes to Norwich, (0, 0, 1) goes to say 10km above london. I think, that means that (1, 1, 1) will surely be 10km above Lincoln, is that wrong? If so, could you tell me where your second answer would end up being?
if you let e1 = (1,0,0), e2 = (0,1,0), and e3 = (0,0,1), you can write (2,0,0) as 2 * e1 + 0 * e2 + 0 * e3. what's the second representation? in other words, how else would you write (2,0,0) as a * e1 + b * e2 + c * e3?
I need this, I need this idea of the axises going to a definite direction (here called Birmingham, norwhich and st. Albanese)
but in 3 dimensional space
you did not define me a direction
for this x axis, y axis and z axis
therefore my friend, even though the length "between origin and Birmingham" can be the same
the destination may not, given the process you are given with
The destination's BIRMINGHAM ffs
It does not matter the coordinate system involved; the destination is clear
listen if I obtain a different x, y, z axis directions
the destination wouldn't be Birmingham
The maths does not contradict itself here, because you're using a different description
it would be the ocean
Okay so
When we switch basis vectors, there is a way to convert from one basis to another
This is the fundamental property of linear algebra
you are allowing me to take a different direction for these axis, by not stating the direction you want it to be in so (u can say x direction for x axis, but like it would be the same even if I take a different position pls understand this)
I can't be more clear to you
Yes, and I'm being as clear to you in kind
you are not teaching me that here, I'm not converting the basis vectors
how civilised and learned
I'm not converting the basis vectors to different one
ah
so if you change the basis vectors
Er... but you are LITERALLY DESCRIBING THIS without knowing it
no no
I do not change the basis vectors
the destination noted by (1, 1, 1) changes
Yes, yes
thats literally what you are saying
If you're changing where x, y, z are pointing on the outset, I hate to break it to you, but that is literally the fuxking definition of a change in basis_
alright we're all leaving
what would you call your rotation and twisting that you're trying to do
point that is already defined
it is called 0,0,0 the origin of a co ordinate system which in near future, u will construct
these are 3 basis vectors
that u are given, respectedly for x y and z axis
Alright
This is what you are given
ALL of u be clear, these are very important for u to understand me
Next;
I'm going to start the process
of finding 6,7,8
@clear moon @valid carbon @bold turtle @candid pulsar
we found the point
taking any direction of x, y, z we did not care
okay?
do u agree with this?
i just wanna point out
DON'T SAY ANYTHING
good 'yay' drawing
do you AGREE WITH THIS
...Sorry, I actually don't agree with this
No, I don't agree that we didn't care about x,y,z
wdym you cant just agree with him
but not in terms of hereC's serpant's direction
Right, so this is going to change your argument, don't you see that?
we agreed with x, y, z in terms of placing the point / locating the point
Sure
and hereC's serpant also agrees with this
why are you speaking in the 3rd person
We didn't take a point that's like 10 kilometeres far away nf say it's 6,7,8
we actually measured everything and like.. took the correct 6,7,8
Also, you know coordinates are written with brackets, right?
now DO YOU AGREE that we found the point?
do u agree now
it alings up with 6 units of x
or basis vectors for more convenience of mathematical ocd
7 of y, and 8 of z, yes
Now, you zip it for 5 minutes
NOW we're back to silence of 5 more minutes
NO NO NO
u stop here this is the most crucial part
pls
So you shouldn't have pinged us BEFORE you were finished.
u agree that we found a point with a conditions PLS STOP TYPING NOW
no I needed to know
if u agreed
u do, now lemme show u some other thing
Look, a few people had agreed to give you 5 minutes to explain yourself; so don't try and ping us before your argument is done. Lay out your ENTIRE argument, without pausing for whether someone has to AGREE with you, because otherwise you're just getting frustrated whenever someone explains to you why that is a hurdle.
Please, by all means, continue - but DO NOT PING ANYONE UNTIL AFTER YOUR "THESIS" IS DONE.
what if
we took the point like this?
both of THESE answers are valid
we didn't change the first answer to get this
I REPEAT
I REPEAT
Truly one of the drawings in the history of all drawings
WE DID NOT
WE did not change the first answer to get this
We got this answer of our own
We did not twist the first answer to get this
this is getting to spam levels of heading font
we just took any arbitary directions of x, y, z axis for our own sake, that just... was different than the first answer's
why are we big now
yeah no stop that
Please dont care about that rn
the more important thing is see what I'm saying
" I did not twist the first answer "
i can read normal sized fonts
" Even though this looks twisted, this is a completely valid answer that we got on our own"
" You would have agreed to this, if I sent this instead of the first answer"
" This being different doesn't make 2 points by the way, it just says we could have gotten any right answer "
" Please don't confuse this with thinking I changed and twisted it myself, I did not have an answer for this second version already that I twisted... I literally made it based on the question "
" And therefore the part where I finish off is saying that.... in 2 dimension, this would have been the same if it actually aligned up with 6,7 of 2d plane"
" But in 3 dimension we get different points because we did not define the direction of the axises, which hereC's serpant believes that it's impossible to do so and math fails fundamentally "
" Ending off, if u did not get anything cleared, re read all of this from here, if still not... go ahead and type"
@bold turtle @valid carbon @candid pulsar @onyx peak
You don't need to reply to my ping rn, just read everything and if u still did not get anything, please reply then. it will be better for us
okay wait im not sure how you're confused/not confused in 2D
can you go through this entire thing in 2D just for the record
I do not want to flood the chat to explain to your autisti- sorry for the different use of English, that I finished the argument and if u read it properly bi- sorry for the misuse of English language, you would understand that u pinged u after I finished my argument
Actually, I believe I have a mis take there
I don't think it really does in 2d as well
<@&268886789983436800>
okay waes
all I want is
i wonder what the 'bi-' is lol
before a punishment
delete these chats after #help-36 message
and let someone learned, to reply everything
I believe strongly that
someone will understand
without a mis understanding
I think we've reached the point of establishing that this server is not going to be able to help you diagnose and remedy your core confusion, unfortunately
you are laughing in a child's face when he's asking a question for knowledge and you are harrassing him and then complaining that he got angered because of you, all u can do is just walk away and say " Don't involve me in this "
wait please just read
what I said
I'm actual and in good faith
THEN DON'T JUST INSULT PEOPLE.
Even someone as learned as I must concede that I am unable to assist with your confusion. It truly lies beyond the reach of my considerable intellectual apprehension.
Please read it from here
oo hi ann too
how about I say a sorry to you
and u forgive me and we forget about this
I will not do such thing
anymore
I just was tired
uh huh
take a break
yes I will not, I'm here to just gain knowledge please don't mis understand me
its been 3 days
maybe youll be given a break
no but we are on the best straw of the talk right now
i'm unironically convinced that talking to chatgpt would help you way more than anyone in this server could lol
I can't leave it at this when I've spent hours of countless explaining to u what my question is
ayo that use of "autistic" as an insult ain't cool at all mate
and when these few minutes of
we can move to threads so can continue later
blud thinks calling people autistic in the math server is an insult
no but like... it would take someone 5 minutes
to end this argument right now
that's the stage it is in
uh huh
i doubt
does ending the argument mean agreeing with you
While people have been very eager in helping you with this (and some have been what I would call overeager), I don't think the medium of discord chat will be an appropriate venue for this. I would encourage you to find someone that you can talk with in real time, with the aid of a physical piece of paper or whiteboard and possibly a beer if age appropriate.
I will also insist that you not use autistic as an insult, and that you not call us bitches; if you continue to do things like that we will need to take more drastic action.
guys why dont all of u become this active when i open a help channel 😭😭
try being entertaining
i think you need to ragebait us more
homie im helping you already, lets go back there
I am very confident that I will end up with the right answer in the next 5 minutes (after re presenting what I showed just now), I will put at sake of everything, I will not talk anything other than the discussion, I will not make comments no matter the situation, please let me present my question for the next few minutes
no, this is not an appropriate way to talk to a student here
if I still end up in mis understandings or hate discussions, then I will do so as you wish but please give me a last chance here
right; you can, but after today i want you to find someone irl to talk to about this instead, because this server will not be able to help you with this
Okay, so this part - you're claiming that this is [A] different or [B] the same as changing the basis?
Let's start with this part for now.
(i feel like she doesnt mean you cant ask questions just... more grounded? ones?)
something like that.
And there is in fact a right answer here
thank you, I want to claim that it is different than changing the basis. we are not changing a basis at all, we are in fact, getting a new different answer but that's a different basis than the one we could have taken as an answer
Sorry, you've lost me at the first hurdle then
You've got a second answer that's in a different basis, you're saying?
in indirect words, changing the basis was not the part of our motive here, I was trying to show you, we can get 2 different answers with the same initial question, without caring about the other answer
infact, not only 2 answers, we can get infinite answers and that's why -- need for direction to be defined
yes.
Okay, so, here's the thing.
and the major point being, these answers were not dependent on each other
yep
If your answer is in a different basis, congratulations, you have changed the basis.
This is what changing the basis is, by definition.
we never got a basis to begin with
Correct; we've had to establish one.
hold on for one sec
all of these "different basis" answers, are not that we "changed the basis from an answer"
I'm telling you that... we can get a different answer itself
we don't need answer
from the point of the question
we define a basis of our own in each answer because the question doesn't give one
Weirdly, and you're gonna have to bear with me here, I'm actually going to pull up a map from the HITMAN series, because I think it's going to be the best way to explain this to you, unironically
ant this is why, we are able to get different answers
not by changing the basis of an answer, but by creating one ourselves
and the basis is obviously gonna be different to most of the other answers (this isn't something mathematical but like...)
Alright
Here is the Berlin map from HITMAN III.
If I use the terms "map-up", "map-down", "map-left" and "map-right" to describe moving up, down, left and right (respectively) along the map as shown, would you agree that the DJ Booth is to the map-left of Agent 47 here?
Yes
But is it West of 47?
(be very careful here; there's something in the first image that would help you)
yes
You sure?
I'm sure
Look at the bottom left here
okay thats a very hidden compass
it would be east then
south east?
yee
okay
But, do you see how "South East" does not match "map-left" in name only?
We've had to use the context that this map has been devised in the first place to deduce any comparison
Whenever you have a question in coordinate geometry, the map is the question
A well-written question provides you such a map to begin with, by default
it seems like the other way around; you deduced a map and you gave an object in it only 4 directions to move to when there's infinite directions it should be able to move to be able to access everything around it
Since when did I deduce this map?
...noooo
I've been GIVEN this map to start
do you know what deduction is
that's a well written map
imma plug more another roof here
The only problem was with moving buttons being only 4 directions
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⬣ ABOUT ⬣
The word "deduction" is...
I don't see what you're asking me here
what does this mean?
You're working under the false assumption that a question does not give you basis vectors to define a coordinate geometrical space
They definitely do
I'm not working under the assumption that a question does not give me the basis vectors at all
When a question gives you coordinates, for example, such a basis is inherently implied
This strongly suggests you ARE working under such an assumption
I'm just working under the assumption that a question does not give me the basis vectors's direction
read my next 2 messages carefully;
Basis vectors;
Suppose if I gave you some coordinates, say the origin (0,0) of a 2D map (two dimensions are simpler for you to get this concept properly)
We did take the basis vectors as it is for both of our answers, we just took different relative directions of those basis vectors
This inherently already implies there is an x-direction and a y-direction, and that they are non-parallel, so that they cover the space
This is already what we mean by "giving coordinates"
sorry bout that @barren hound @vale vigil
i meant burnout can sometimes fuck your mind so taking break is a good idea
two dimensions don't properly capture the necessity of a relative direction for the axises
Having a dimension by DEFINITION does capture a relative direction
Else, it is NOT a dimension
You MUST understand this before anything else in this discussion.
as I told here; I am not arguing that x and y and z do not convey their basis vectors,
what I'm trying to show you is, in which direction they point out, matters
And what I'm trying to explain back to you is, when you define a dimension, it already HAS a direction implied
@bold turtle if u see here, there's 3 coloured lines that are basis vectors
let's say they have an arbitary direction, without the loss of generality
Is this in 3D? even despite me saying that working in 2D would make this easier for you to get?
It's 3d
these are 3 more basis vectors, that.. quite infact.. are just as linearly spaced as the first 3 ones, and also, we have the same point of origin here
but if u try to form a point
or a vector
they'll end up in different positions
that's why I argue direction matters, the axis's direction should matter, in 3d space
I'm just waiting for you to ask me a question like "you just flipped it, you obviously changed it "
you just flipped it, you obviously changed it
is not a question, for starters;
but if I DID respond with this, your point seems to be that you disagree that this is true?
and for you to think I'm gonna give an answer like " well 3d space is symmetrical right? soo like for an object that's seeing this graph out of this... theyd be like............ different positions so you're obviously wrong, it wouldn't matter if I flipped it"
but nope, here's my actual response
I flipped nothing, you didn't define/denote an answer to begin with, I just took a, perfectly, valid, real, correct answer that formed with the initial questions
( the initial question was about the origin's location of which point it is, and the basis vectors, and the amount of linear spacing, like how the graph is)
based on this I took this answer
But look, the initial question inherently gives you a basis the literal moment they tell you any coordinates
yep
a basis x, y, z
but not which direction it points to
Right
Look
why does this seem flipped to u when the first answer didn't
what would have happened if I showed u this as the first answer
these are literally derived from the same question
I can't be more clear to advocate for a need of direction of the axises to be relative instead of x, y, x direction
When we say a coordinate (2,5,6), we're inherently saying that relative to an origin and some notion of a unit, we have a point "2 units in the x-direction, 5 units in the y-direction, and 6 units in the z-direction from the origin"
Do we care where specifically the literal x-, y-, and z-axes are?
yep
not really
nah
that's just confusion
right but the point you see is that even though this looks like x-, y-, z- of the original answer
you fail to understand, that, THIS is also an original answer
It.. actually isn't
Because you're playing in the same court as the question
there's nothing saying that, axises situated this way is the original answer
Firstly, the plural of axis is axes
we derived this answer from question yes
but we derived this also from the same question
yeah, just different direction of axes
"Derived" how?
the question didn't specift the direction of axes
just like how we derived this
you tell me in mathematical language how we derived this
I'll copy paste it for the other answer
it would be the same; valid and correct
No, the onus is on YOU to tell me how; it's YOU who said we "derived" these in the first place
we never had an answer to depend upon for the direction of the axis
You're working under the assumption that our mouths are yours
so, we had a question
that said everything, including the basis vectors and point of origin
and said to find a point x, y, z okay like 5,6,7
from it, can we derive a valid answer as this?
Then your answer, (5,6,7), whatever it may be, already uses the same basis
It now reads "5 units in the x-direction, 6 units in the y-direction, and 7 units in the z-direction from the origin"
in here just imagine a point a bit right side to the white line (I can draw it if u want)
can we get a valid answer like this
yep
is this a valid answer then
Why do you think this is invalid, first?
So then we're all good; the maths hasn't broken down, do you not see that?
I didn't say the system was flawed
I said the system didn't apply to that
and if u continue with me on 3 dimensional space you'd see where I'm arguing from
okay how about this, maths hasn't broken down as of now
as of this point in our discussion
maths hasn't broken down
cool?
now if you hold on with me , can I ask you this question
If you decide on changing where x-, y- and z- point in the first place, do you not agree that (2,5,6) and (5,6,7) still refer to relative points, that both still mean:
"2 units in the x-direction, 5 units in the y-direction, and 6 units in the z-direction from the origin"
and
"5 units in the x-direction, 6 units in the y-direction, and 7 units in the z-direction from the origin"
?
I do not decide on changing the points to x-, y-, z-
please bear with me to know why
Alright
So, there's a point we need to find. 5 units in the x, 6 in the y, 7 in the z
I've constructed a graph to plot this out
@bold turtle this point reads 5 units in x direction, 6 units in y direction and 7 units in z direction
so, is this correct of the question "find 5,6,7 with all the units"?
Where each direction corresponds to which basis vector colour there?
yeah I mean, I've drawed it horrendously, but it should
That's not a yes no question
I'm asking you which colour is which of xyz
Yes
I mean.. they correspond very well to 5,6,7 co ordinates
take yellow as y, red as x and white as z direction
Okay, so - this is not a good question, to start. Wherever did you come up with this? /genuine
they're exactly as such; 5 times red's length in x, and 6 times and 7 times in y and z
why is this not a good question to start? they've given the position of the point of origin and basis vectors
and asked us to plot out the point 5,6,7
we can just ignore the fact that most of the points are not plottable with a finite data
also we ignore our error fact
and assume the point we plotted is 5,6,7
Look, knowing whether it's a good question or not takes years, if not decades, of experience, and it's not really that easy to explain why, suffice it to say that it's a poor question.
Pictured here, Waes:
if that's your feeling, I can accept that, but it is a question no matter what. if the question is flawed you tell me with proofs
its a euclidean 3d space
"this isn't a good question because i'm smarter than you"
well more like intuition
is this correct? we Derived a point 5,6,7 true to it's co ordinates
Then is it a correct representation and have we correctly located the point
that we were asked to
have we?
Questions can be flawed; and at this point we're delving into philosophy, not maths, so bear with
it's not a good question because it doesn't mean anything-
it does
You might as well say 'find (5,6,7) with all the chicken sandwiches'
it means to show u something and for you to stop it by saying it's a bad question makes it inable to serve it's purpose
u dont just say it's not a good question without understanding it's purpose
right now if I tell u "there's a need to define a relative direction for axes"
you just would say "what, this person is nonseical"
and when I try to give the intuition, by taking u to the necessary question first
Listen, you can make something "sound" like a good sentence, but it be completely nonsensical.
you say "what, this is nonsensical I'm not going further"
points dont have units
5,6,7 is a point
accept it or not
it's a 0 dimensional point
u can't put 3d objects in it
what do you mean when you say 5,6,7? that statement itself requires a basis to make any sense
fight me a mountain, 3,6,7 can only be a point in a 3d euclidean space
can you find (5,6,7) with all the chicken sandwiches
The basis is the co ordinate system
with basis vectors
1,0,0
0,1,0
0,0,1
and with a origin 0,0,0
okay sure
we know the origin's location
and what point are you making
is this a correct representation
of locating it
the point perfectly aligns with 5,6,7's position
Sure then I guess.
It is a representation of describing a coordinate-triple, yes
you can make pictures
bear with me, I'm not finished yet
drawing a 3D thing in 2 dimensions is gonna cause some confusions anyway, I'll take your word for it
we have a point here
ill do you one better
no it doesnt
if you change your basis vectors to point in the opposite direction
we just changed the directions of x, y and z axis so that it would
yeah
I did do that
fundamentally it's a different point, it's like you flipped your whole space
How do you translate back and forth between coordinate systems that use different basis vectors?
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you can't talk about high level stuff without talking about high level stuff
in a different basis, yes
If you talk about change of basis (even without knowing it), you'll get a reply about... change of basis.
any point can be made to have coordinates 5,6,7 in an appropriate basis
Alright I think it's time to stop your words, I have a really, beautiful thought experiment (it's literally this but like a story please don't think I create something else nonsensical here, unless u do after reading it)
@vale vigil
I'm telling you this right now:
you need a lot of experience, and that includes possibly hundreds of worked examples, on 2D coordinate geometry.
You might think this irrelevant, and maybe people your age might think so too. However, the vast, VAST majority of the concepts you're trying to grapple with in 3D exist in 2D and they can be explained in 2D as well. To this end, however, you need to put in the effort to go through these examples AND answer questions on these topics, and a lot of them.
This is not me gatekeeping you - it is your own lack of experience and underlying knowledge that is limiting your grasp on this. I can appreciate that this is tricky as a concept, but that's because you need much more solid foundations like this. To use an analogy, you're trying to fly a rocket to the Moon here, yet your rocket doesn't even have wings.
(i dont think rockets have wings waes)
Not the point.
(sure but the more you know)
-# fins i think
I personally will not entertain this discussion any further than I have done, which I think was far more than I would have liked myself to have done.
Yeaaah same, possibly
hopefully
I'm just going to reiterate some resources that are good:
- Another Roof.
- 3Blue1Brown
- ...KhanAcademy
You have homework.
At this point you're mostly just wasting people's time. It is now on you to do some due diligence on your part and read through the resources people have given you.
So, there exists a 3 dimensional euclidean space, with a lot of objects, perhaps more than 2 3 dimensional objects for your sake of understanding.
Now, we have 2 humans trying to communicate via different rooms (different rooms just meaning; they can't see each other, and just read words or talk words, they can't show anything) .
What they're trying to communicate is really silly: person 1 , whom we call Billy, is operating a space ship that has no windows to see, actually let's assume we have just 2 3 dimensional objects somewhere floating in space, cool with that?
Now, Billy is trying to fly his spaceship to person 1 , whom we'll call silly.
Silly can see everything as Billy is coming towards him, silly can use co ordinates and mathematics to explain Billy everything.
The task is really simple, silly sees an object, that if billy's spaceship hits, Billy dies.
That's why silly has to say the co ordinates of that object, with respect to billy, we ignore a lot things, like 3 dimensional objects not being points, and time;
let's suppose that Billy and like his spaceship, is one point at 0,0,0 and we are given basis vectors as well, and the object is a point as well, now all silly has to do; is convey billy the point's exact location so that billy understands the exact point where it is, and doesn't die
And as far as this multi-hour discussion, we have concluded that different directions of basis vectors (not different basis vectors here, just different directions of basis vectors) would give us different points of location for the same co ordinates in 3d space
So @valid carbon and learned person @spring haven , our task is to help silly find the appropriate basis so that even billy can know where to not go by his own pov via co ordinates
keep in mind: the appropriate basis is not something like the correct numbers, it's the correct direction of those basis vectors
Please stop pinging people who left the conversation
you've introduced a lot of layers of complexity here
oh alright
Should people want to answer, they'll do it on their own
such as the fact that the spaceship is moving
ignored that
ignore everything like that, it's a thought experiment but u get the idea
points, co ordinates, correct direction of basis vectors
also "different directions of basis vectors" just means changing your basis, so I don't understand the distinction you made there
alright
how is it changing your basis?
what does basis even mean
is basis "basis vectors"
and that's the problem, you fundamentally don't understand what you're talking about
is basis "the number of dimensions x, y, z.... n"
a basis is made up of basis vectors
no I do I'm just confused with your wording of it
right
so would u consider
1,0,0
0,1,0
0,0,1
a basis?
yes that's a basis
this basis, is it 1,0,0
0,1,0
And 0,0,1?
suppose we wanted to keep the basis vectors as those
is it a basis
I mean is it a valid basis sorry not if they are the basis
Is this a valid basis
if I wanted to keep vectors as
1,0,0
0,1,0
And 0,0,1
there's a distinction you need to make between vectors and coordinates. The problem is that, in R^3 (which is 3D euclidean space) they look pretty much identical
I'm asking right now that, is 1,0,0 basis vector of x, 0,1,0 basis vextor of y and 0,0,1 , basis vector of z
Vectors do not change with whatever particular basis you choose. They are simply points
Coordinates are how you describe a vector with respect to a particular basis
be able to form this
yeah
"with respect to a particular"
a particle axis
a particular basis
the problem in R^3 is that you can't really describe a vector without coordinates
unlike other vector spaces
which I suspect is part of where your confusion is coming from
are u saying that
what this means is you cannot describe any direction mathematically other than by giving its coordinates in some basis
this, with the basis vectors being 1,0,0 0,10 001
is impossible in R^3?
are u saying this?
no?
so are u saying that
this with the basis vectors being that, is possible in R^3?
just say yes or no if u want to, no need to clear my confusion on some other topic which I may not have a confusion of
this particular thing specifically
I don't understand your question
it's a yes/no question
is this basis possible
with the vectors being
1,0,0
0,1,0
0,0,1
for 3 dimensional euclidean space
those directly correspond to x axis y axis and z axis
yeah sure
what would those vectors be then
in your basis
like (-1,0,0) (0,-1,0) and what looks to be some other random vector
those would be scalars of our 3 vectors
-1, 0,0 is a co ordinate where our vector is scaled by -1 * basis vector of x (we ignore 2 zeros of x here)
and doing the same multiplication
for both of the other basis vectors
dot products probably
but it's NOT what we care about right now
All we care is, if this is possible with basis vectors being 1,0,0
0,1,0
0,0,1
then
is THIS possible with basis vectors being 1,0,0 0,1,0 and 0,0,1
what is "this" and what do you mean by it being possible
same 3d euclidean space
you've just drawn some vectors on some axes
that visual representation of the graph/co ordinate system that originated with those (we took an arbitrary direction for each of the axises)
not on some axes
it's x, y, z
but essentially not the same as your desmos
x,y,z are just labels
alright
it's 3 axes
and those 3 vectors are the basis vectors
corresponding to each of the axes
good now?
sure
then how about now
over here
Same setup, is this possible now?
1,0,0
0,1,0
And 0,0,1 as basis vectors
and those 3 dimensions are corresponding to these vectors as their basis vectors
is this setup possible and factual in 3d euclidean space as well?
just tell me a yes or no
sure
cool
these are, solely decided by the relative directions of where u keep the axes towards
that's why in one set up its towards the top right (in visual space)
and in one set up its to the bottom left (in visual space, I know about 4 quadrants by the way.. in actual visual space these would be at top right and bottom left tho)
I don't get why you're not doing this experimentation in 2D, it would make drawing the figures way easier
and doesn't really change anything substantial
no you wouldn't understand it
the point being that, we need a third object
To observe this for what it is
if we don't have a third object
bottom left, would be as top right (I mean... it would be flipped for our view, but it's not the graph that's flipped, it's our view that's flipped)
but if we do have a third object that doesn't care about this graph
ok I'm done with this lol, it's clear you don't actually care about what people are saying
you're just acting obtuse and degrading
this is why, you wouldn't understand it in 2d space
actually it's not why u WOULDN'T be able to
thats not how mirror images work..
this just an explanation of why third object is necessary
it's not a mirror image
it's a showcase that, in 3d space, if we flip the direction of the graph
then the position would be different
and we can't allow the position to be different than what we mean
yeah what does flip mean here then
I’ll give it a try, are we still discussing the original question?
it's a different representation
of a system... uh alright how do I say this
looks poorly defined though
the bottom one seems like a water reflection across the orange line, but the top one is just rotated 180 degrees for no reason
look at this, over to the left side; u have x being the horizontal line, y being the vertical line (for u, this is actually 3d space and there's z also but I'll make it more comfortable)
and we already have the basis vectors
1,0,0
0,1,0
And 0,0,1 even though I didn't draw them they're there, and also the point is at 5,6,7 and it sticks true to being at the correct location of 5,6,7 with those basis vectors
over to the right, even though it looks flipped, it's quite literally the same because everything in the graph is being flipped
but to an outside, observer, who is in the same 3d euclidean space
by the way this applies to the right side also, the point that u see is at 5,6,7 to it's co ordinates when the basis vectors are the same numerically as the left side
its not the same after flipping.
this is where the confusion began
yes but I'll talk about this in a second
I already know that
you'll understand what I mean, hold on
but to a third object theyre different, why?
because
the direction of axes matters
if a person 2 talked to person 1 about the left side's graph
but person 1 thought it was the graph like it is in the right side of the picture
then person 1 would have a wrong understanding of the point
And this is where u come in
"it is not the same after flipping" Can u redefine this statement?
because, to me, I don't see any original answer that we flipped to get the second answer
I see infinitely many answers that we ORIGINALLY got, from the question itself; which didn't specify the direction of the axes
we didn't flip anything
the question itself literally didn't gave the direction of the axes
ant dont confuse the question here
This is the question
This is the question
but
these people don't talk about direction at all
I've been arguing here
for 22 hours or more
no one gave me a direction, they said it doesn't matter
BUT IT CLEARLY DOES
you need to know how the axes is situated even if u have the numbers of what axes is situated
I need this direction
in 3 dimensional space even more precisely
because there's infinite directions for a point to go; infinitely different points that are gonna be located, with the same numbers called basis
all of the answers are ORIGINAL
NOTHING IS FLIPPED
the question needs to imply the direction, otherwise it is incomplete!!!
and what my purpose of making this thread is
to argue that, the direction is impossible to define
because u have a paradox of defining another x, y, z and how it would be situated to construct the line for the perfect direction
and more and more
Alright, I'm gonna stop here PLEASE READ FROM HERE ANYONE WHO'S GONNA COME FORTH ON
I perfected my argument
I believe........
okay so if you want a reliable coordinate system and basis vectors to plot your points on
then you can assume the basis vectors to be perpendicular to each other and in the directions as specified in the diagram below
for your convenience and to anyone with whom you're going to discuss 3d geometry with
that doesn't work
we literally can get a lot of answers just with that
and by the way, we're not even changing the origin for the third object's pov
Alright, I'm gonna stop here PLEASE READ FROM HERE ANYONE WHO'S GONNA COME FORTH ON
no we cannot..
just fix them in those directions in your mind
if u see my picture... do u realize both of them follow the same property of perpendicular angles
what is this property of perpendicular angles
to be perpendicular to yadayadayada... This is correct but u can literally just change the direction of it and it would follow same property
but the coordinates you got with the first set of basis vectors would be different in this new system
they would be numerically same
wouldn't they
nope because you're changing the direction of positive and minus as well
so in the new direction, the place where it should have been positive with the current directions, it would be negative, and vice versa
so 3,4 wouldn't become -3, -4
u literally changed the axes as well
the quadrants (positive, negative, positive positive etc..) change with u
this is not true
3, 4 means that
lemme give u an explanation
you are using 3 times the x vector and 4 times the y vector
once you flip both your vectors
you need to use -3 times the new x vector and -4 times the new y vector
to get to the point you started with in this new system
correct
say any point on the top right of the origin is the point you say
Just see here, I've already given 1,2
and the point remains there even in this new system
it's the same numerically as in this representation where u gave, both of them are 1,2 right
we can ignore the fact that we got this from an old system
you are rotating the point here
this can be an entirely new system
the point remains there
we can ignore that it's rotated
we literally can create this ourselves
not required to link it with an old system
therefore, it is 2 systems
having numerically the same point
but they're different in direction for a third object viewer
This is what I meant
when I drew this
numerically same, spatially different
direction MATTERS that's why
what do you mean by numerically same
numerically relates to numbers
The point would be 1,2 in the first system
the point is still 1,2 in the second system
it did not become something like -1, -2
then they are not the same point
+1, +2
the point denoted by what you say as 1, 2 would not be the same
yes but they're numerically the same in terms of co ordinates
It wouldn't become another number
but two different points
both of those systems's point would still be +1, +2
Even though they'd be in different locations
because, we have imagined a different direction
for the axes
yeah since you are using another coordinate system to define 1, 2
if we imagine one single direction
we're not using another co ordinate system like u think
we just changed directions linearly
And no question ever specified about directions
if we imagine one true direction, we can't change this at all and imagine more than one answer for 1,2 in any system
I appeal for any of the learned persons <@&286206848099549185>
to tell me how we'd define that true direction
ok so the same way in 3d space you know that they are perpendicular but youre not sure in which way
they're perpendicular
literally both of the systems follow same properties
their axes are situated in different directions
that's it
they're perpendicular
and follow everything, like same basis vectors
? wtf did i just walk into
if you want to comfort yourself then say x is ponting to the right in the plane of paper, y is pointing to the top in the plane of paper, and z is pointing at you
The fact that their axes is situated in different directions
you can invoke the real world in this case to fix your thoughts
I'll comfort you by this now, this is real world what im talked about;
he’s talking about you btw
i have no idea what ‘real world’ you’re on based on the convo im reading here
@candid pulsar This is what u imagined, a perpendicular axis stuff
sure..
not exactly that way
but those are perpendicular too i guess
@candid pulsar and this is what I imagined, keep in mind this is not the "flipped version" Of that
this is an entirely, original version, that I don't need that for me to generate this
BUT
if u look at the numericals
yeah i get it
you will have literal same numericals
numerically the same point
yep that is why I argue that the direction of the axes
matters
im getting fucking lobotomized by this chat dude
none of these other people understood me
you can imagine it in this way alone
to fix your thought
That is where rigorousness breaks and it doesn't become mathematical
so when you are trying to imagine (5, 6, 7) for now just think (5 to the right, 6 to the top and 7 towards me)
well yes
it's not
but for your standards its more than enough
how is that supposed to matter
im assuming that you’re sticking to the og question of “can a line exist as an equation in a 3D space”
and you would feel better working with this till you get a good exposure of vectors and other stuff like that
mathematically if it was valid, we didn't need to construct equations for line, we could've said " Oh a bit slanty slanty over here, and a bit top left over there and a bit"
respectfully, I think it's not
here
lemme show u this
are those fucking runes
yes maths is confusing like that
there's a third object that cares if u change it into a wrong perception of direction of axes
no
that is why we are trying to imagine things like that with simpler and easier-to-understand real world notions
its not always easy to go full abstract mode
sometimes you need a crutch
basically wtf is going on here

why do you even have 3d geometry in 9th grade lmao
we are 3 dimensional, and this is real world 3 dimensional. we are much more closer to this than we are to the weird bending of black holes (for our perception)
For us, it's almost always a Euclidean 3d space
which is what we're talking about here
how do u think I got these questions without knowing any of the vectors text book knowledge?
yeah but we need an easy to understand way to note points
okay so basically your question is
can a line in 3D euclidean space be represented as an equation right
because we literally live in 3d and ur mind could think so
well yes
or go to (1, 2, 3)?
3d vectors
u do realize that... There's a lot of "rights?
what about "move to YOUR right"
thats easier to understand
@scarlet sinew hold one 2 minutes let me reply to this person
@candid pulsar
all the yellow lines (and more)
are considered to be "towards your right"
all the red lines and more to your left
so which one exactly is "move towards your right"
LITERALLY we are situated in the middle
imagine it like that
that semi green line's center is where we are
so which one of the directions is "towards your right" in that yellow lines
in the right perpendicular to you
?
yes but all of those yellow lines are directions of "right"
u need co ordinates to describe the correct right
only one of those "right"s are perpendicular to you
that right
the perfect right
And how would u say something that's perpendicular to a 3d object?
how do u explain someone what perpendicular is
to them?
hmm? maths has already done this really rigorously
by co ordinates
sure, human intuition has a right too
but
it's literally crumblingly undefined
..and thats enough for your purpose for now

I'm going back to replying to the other people
sometimes you are asked to guide through elementary math with rules and intuition
and only after you reach a decent level of knowledge are you asked to wrack your brains
blurple what are ur thoughts about this convo so far
im entertained
im lobotomized
3d vectors
now
in which direction
would these vectors be?
basis vectors at least
in directions of their axises right?
spreading out from a center
in what way? u can define something like perpendicular 90 degrees from each other
but in what way
HOLD ON DO NOT SPEAK YET
yes this is a weird question but it is true
you cannot say what direction they are in with the English we work on for now
Please be polite to helpers. And I would hope that helpers are also being polite to you.
how tf would i know
look the way axes point dont matter right
oh sorry about that
they do matter
best description you can give is, x-axis is in "this" direction, y-axis is in "this other" direction, and z-axis is in "this third other" direction
they really matter
but they are fixed in space
just that you cannot describe them with English or any other language properly
however, it is much easier to use words like up, right, and towards
then i expect you to define them mathematically
so thats what we go with at the start
that’s describing from a static POV
and then let you in the details once you are comfortable
yea
they legit matter... if they don't, I can pick 2 answers and say " Hey these look like 2 different lines even in co ordinates and positions to me, so the equation didn't tell me which of the infinite lines I should pick even though it told me something like the measurmeent, it still led me to nothing than the original question: which of the infinite lines am I describing"
well yeah they are fixed in space
i just
cant say HOW they are fixed
and the best to do as consolation at this point is
convention
like what ive been saying
that means I can pick any 2 or more arbitary positions where I can keep them fixed
and u have my reply from here
correct, and there are several such options
you can take one of them
and work with your problem
so how is that different then saying "hey I know a line exists, I just don't know where it is okay
the easiest to go with
I thought u were real and the truth and rigoroys
is convention
is this all u got? a rough "idk"
but theres a limit to human capacity
sure if you are a multidimensional god
you are not the one to define human capacity
