I have a function:

$\displaystyle f(m,n) = mn$

The domain for this is $\displaystyle Z \times Z$. The range is $\displaystyle Z$. How can I prove if it is one-to-one, onto, or both?

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- Oct 5th 2009, 03:57 PMProjecttProving a function is one-to-one/onto
I have a function:

$\displaystyle f(m,n) = mn$

The domain for this is $\displaystyle Z \times Z$. The range is $\displaystyle Z$. How can I prove if it is one-to-one, onto, or both? - Oct 5th 2009, 04:08 PMPlato
- Oct 5th 2009, 04:20 PMProjectt
Ohh, I thought Z was some arbitrary set, not the set of all integers. Thanks.