List questions from homological-algebra

Published on 13 May 2026 - 17:09

181

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If $M$ is equivalent to zero, must $C$ and $C/M$ be equivalent?

Published on 14 Apr 2026 - 17:01

217

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Completion and endomorphism ring of injective envelope

Published on 10 May 2026 - 17:25

186

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Question about a proof of mapping cones and the octohedral axiom for a triangulated category

Published on 13 May 2026 - 18:42

155

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Why is a direct summand of a pretriangle a pretriangle?

Published on 13 May 2026 - 3:24

378

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How to think about the octohedral axiom for triangulated categories?

Published on 11 May 2026 - 13:52

848

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Is Category Theory a prerequisite for Homological Algebra

Published on 12 Apr 2026 - 12:37

204

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On the homology of a graph

Published on 16 Apr 2026 - 9:43

346

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Typo in Atiyah and Macdonald prop 2.9?

Published on 16 Apr 2026 - 6:14

72

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Show that $\mathbb{Z}_6$ has the unimodular extension property

Published on 14 Apr 2026 - 5:50

206

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Example of Gorenstein ring that has infinite Krull dimension?

Published on 29 Apr 2026 - 12:42

81

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Completion and endmorphism ring of injective envelope

Published on 10 May 2026 - 14:51

164

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Conditions on a Module Implied by $\mathrm{Ext}^1 = 0$

Published on 10 May 2026 - 19:53

121

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$\mathrm{Ext}^1$ of ideal in $k[[x,y]]$

Published on 13 Apr 2026 - 0:54

248

Views

Why are semi-simple abelian categories pre-triangulated?

Published on 10 May 2026 - 14:05

List Question

What is the relation between Gröbner basis and syzygies?

If $M$ is equivalent to zero, must $C$ and $C/M$ be equivalent?

Completion and endomorphism ring of injective envelope

Question about a proof of mapping cones and the octohedral axiom for a triangulated category

Why is a direct summand of a pretriangle a pretriangle?

How to think about the octohedral axiom for triangulated categories?

Is Category Theory a prerequisite for Homological Algebra

On the homology of a graph

Typo in Atiyah and Macdonald prop 2.9?

Show that $\mathbb{Z}_6$ has the unimodular extension property

Example of Gorenstein ring that has infinite Krull dimension?

Completion and endmorphism ring of injective envelope

Conditions on a Module Implied by $\mathrm{Ext}^1 = 0$

$\mathrm{Ext}^1$ of ideal in $k[[x,y]]$

Why are semi-simple abelian categories pre-triangulated?

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