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Results tagged with homological-algebra
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user 50838
(Co)chain complexes, abelian Categories, (pre)sheaves, (co)homology in various (possibly highly generalized) settings, spectra, derived functors, resolutions, spectral sequences, homotopy categories. Chain complexes in an abelian category form the heart of homological algebra.
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Exact triple yields a distinguished triangle in derived category
In Methods of Homological Algebra before Proposition III.3.5 there is a short comment:
"The next proposition shows that any exact triple [of complexes] can be competed to a distinguished triangle".
H …
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