# Derived categories for the working mathematician

@article{Thomas1999DerivedCF, title={Derived categories for the working mathematician}, author={R. P. Thomas}, journal={arXiv: Algebraic Geometry}, year={1999} }

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.

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Categories for the working mathematician, Graduate texts in mathematics

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Mathematical Institute