Pullback (cohomology) (source code)

= Pullback (cohomology)
{wiki=Pullback_(cohomology)}

In the context of cohomology, a pullback is a construction that allows you to take a cohomology class on a target space and "pull it back" to a cohomology class on a domain space via a continuous map. This is particularly common in algebraic topology and differential geometry. \#\#\# Formal Definition Let \\( f: X \\to Y \\) be a continuous map between two topological spaces \\( X \\) and \\( Y \\).