Jeffery Mensah

The $\mathrm{Tor}$ functors, which are ubiquitous in algebraic topology and more generally homological algebra, encode the failure of the tensor product to be an exact functor. As a derived functor, one typically defines...

In this post, we discuss equivalent characterizations of the homotopy extension property of a topological pair $(X, A)$, which states that a homotopy...

In this post, we discuss an invariant of a complex representation of a finite group, and show how this yields a connection between irreducible real and complex representations...