Skip to main content
1 of 3
Romeo
  • 2.7k
  • 19
  • 27

$A_\infty$ structure of (co)homology of a space

Let $X$ be a topological space, and $X^X$ the category with one object ($X$) and morphism homeomorphisms of $X$.

(1) What is the exact meaning of: $H^*(X)$ is a an $A_\infty$-module over $X^X$?

(2) Does $H_*(X)$ also have an $A_\infty$-module structure? Is it the same as that of $H^*(X)$?

Romeo
  • 2.7k
  • 19
  • 27