Here's the problem: Find sets and and functions and for which but .

It doesn't even have to be real example functions, just a picture would be good. I just can't think of anything. Thank you!

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- Feb 26th 2008, 10:48 PMsfitzfunction compositions
Here's the problem: Find sets and and functions and for which but .

It doesn't even have to be real example functions, just a picture would be good. I just can't think of anything. Thank you! - Feb 26th 2008, 11:32 PMJhevon
- Feb 26th 2008, 11:50 PMsfitz
Oh my god, I am so sorry, I typed the problem wrong. I meant and ! Can you still help? The part I typed was part a of the problem, and I'm stuck on part b. I'm really sorry.

- Feb 27th 2008, 08:12 AMJhevon
- Feb 27th 2008, 10:27 AMsfitz
ok, I understand, f must not be onto for it to work, so that there are elements in B that are outside the image of f. thank you!

- Feb 27th 2008, 01:38 PMJhevon
- Feb 27th 2008, 04:08 PMsfitz
I did prove it! That was the other part of the question, but I couldn't prove it without being able to think of an example

- Feb 27th 2008, 04:23 PMJhevon