(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Prove that the nonempty fibers of a map form a partition of the domain.

3. The attempt at a solution

Ok so we have some map phi: S -->T

And we want to show that its pre-image phi^{-1}(t) = {s in S | phi(s)=t} forms a partition of the domain.

Im really confused here. I assume that it is talking about that domian of phi which is S (i think) but i have no clue how this preimage forms partitions.

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# Homework Help: Fibers of a map

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