Thread: "push-forward" ? View Single Post

## "push-forward" ?

Can someone help me understand what this is, in as simple terms as possible?

If I have a function $$f: A\rightarrow B$$ and another one $$g:B\rightarrow C$$ I know the "pullback" $$f^{*}g: A\rightarrow C$$ is $$f^{*}g = g\circ f$$ (correct?)

But what about the push forward $$f_{*}g$$? What is that?

Thanks for any help.
 PhysOrg.com science news on PhysOrg.com >> Galaxies fed by funnels of fuel>> The better to see you with: Scientists build record-setting metamaterial flat lens>> Google eyes emerging markets networks