Webrelaunch 2020

A resolution of the constant sheaf

A certain Grothendieck topology assigned to a metric space gives rise to a sheaf cohomology theory which sees the coarse structure of the space.

Already constant coefficient produce interesting cohomology groups. In degree 0 they see the number of ends of the space. In this talk we discuss a resolution of the constant sheaf. It serves to be a valuable tool for computing cohomology.