#Cardinality Proof
steady boughBOT
- Wait patiently for a helper to come along.
- Once someone helps you, say thank you and close the thread with:
+close
- Feel free to nominate the person for helper of the week in #helper-nominations
- Do not ping the mods, unless someone is breaking the rules.
- If you're happy with the help you got here, and the server overall, you can contribute financially as well:
subtle basin
as |A|=|B| then they have the same cardinality so I would have thought it was required that f: A->B is a bijection
compact ember
If f is onto, then it is one-to-one
subtle basin
oh I wrote it down wrong. its prove if f is not onto then f is not one to one