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History of tag 0E43

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assigned tag 0E43 2017-07-07 b056c6e
Tags: Added new tags
changed the proof 2017-07-06 ef31dda
Small changes to homology
changed the proof 2017-07-03 66e8c12
homology.tex: shorten proof of Lemma \ref{lemma-kernel-mono}
changed the statement 2017-07-02 3585495
homology.tex: fill in two more omitted proofs

Lemma \ref{lemma-abelian-opposite} (I hope I didn't miss any
subtleties here) and Lemma \ref{lemma-characterize-injective}.

Note that the latter still applies in any preadditive category
as long as we assume that Ker(f) resp Coker(f) exist.
Maybe it's worth generalizing it?
created statement with label lemma-kernel-mono in homology.tex 2017-07-02 d9fcbef
homology.tex: clarify proof of Lemma \ref{lemma-coim-im-map} for me