# Commit 2020-03-26 00:32 6e6c81a4

View on Github →feat(algebra/homology): chain complexes (#2174)

- thoughts on chain complexes
- minor
- feat(category_theory): split epis and monos, and a result about (co)projections
- total functor faithful
- homology!
- remove lint
- something something homology
- comment out broken stuff
- adding comments
- various
- rewrite
- fixes
- Update src/category_theory/epi_mono.lean
- Update src/category_theory/epi_mono.lean
- Update src/category_theory/epi_mono.lean
- better use of ext
- feat(category_theory): subsingleton (has_zero_morphisms)
- revert some independent changes moved to #2180
- revert some independent changes moved to #2181
- revert independent changes moved to #2182
- fix
- Apply suggestions from code review Co-Authored-By: Johan Commelin johan@commelin.net
- changes from review
- module docs
- various
- Update src/category_theory/shift.lean Co-Authored-By: Kevin Buzzard k.buzzard@imperial.ac.uk
- various
- various fixes
- fix
- all the minor suggestions Co-Authored-By: Markus Himmel markus@himmel-villmar.de
- ugh... fix reverting stuff from #2180
- off by one
- various
- use abbreviation
- chain as well as cochain
- satisfy the linter
- some simp lemmas
- simp lemmas