%0 Journal Article
%T Derived categories for the working mathematician
%A R. P. Thomas
%J Mathematics
%D 2000
%I arXiv
%X It is becoming increasingly difficult for geometers and even physicists to avoid papers containing phrases like `triangulated category', not to mention derived functors. I will give some motivation for such things from algebraic geometry, and show how the concepts are already familiar from topology. This gives a natural and simple way to look at cohomology and other scary concepts in homological algebra like Ext, Tor, hypercohomology and spectral sequences.
%U http://arxiv.org/abs/math/0001045v2