#Confused about set theory symbols

16 messages · Page 1 of 1 (latest)

rain hazel
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I think the symbols are union and intersection but if they are I am confused how to do the union of one set.

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cobalt shellBOT
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queen anchor
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im assuming by $\bigcup A$ they mean $\bigcup_{P \in A} P$

mystic coyoteBOT
queen anchor
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like for example if $F={{1,2},{5,6}}$ then $\bigcup F={1,2,5,6}$

mystic coyoteBOT
meager cedar
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well

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the $\bigcup A$ is the union of all members of members of A

mystic coyoteBOT
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neruguis

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queen anchor
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yes, like i said

meager cedar
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and the U upside down is the intersection

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just the ones that are in all

rain hazel
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ok thank you

meager cedar
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ya welcome

static moat
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+close