List questions from derived-functors

Published on 10 Dec 2017 - 12:52

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$\operatorname{Ext}^1(M,R/m)=0$ iff $M$ is projective

Published on 12 Dec 2017 - 17:18

271

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Ext group as derived functor of Hom

Published on 03 Jan 2018 - 15:48

16.4k

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What is the Tor functor?

Published on 04 Jan 2011 - 13:14

1.9k

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Derived category and so on

Published on 16 May 2011 - 12:04

2.4k

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Meaning of "efface" in "effaceable functor" and "injective effacement"

Published on 09 Jun 2011 - 17:54

847

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Derived functor of a derived functor

Published on 27 Jun 2011 - 8:46

408

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Is $\mathbf{R}F(Z^\bullet)$ equal to $\mathbf{K}F(Z^\bullet)$ when $Z^\bullet$ consists of $F$-acyclic objects?

Published on 05 Aug 2011 - 20:17

2.1k

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Derived functors of torsion functor

Published on 30 Aug 2011 - 18:06

160

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Question about derived functors

Published on 04 Sep 2011 - 1:03

1.7k

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Derived functors are Kan extensions

Published on 27 Dec 2011 - 17:37

223

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Right derived functor of diagonal morphism equals direct image on line bundles?

Published on 21 Jan 2012 - 12:46

2k

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Left-derived functors

Published on 01 Feb 2012 - 1:57

622

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Some questions about the Tor functor as a two-variable functor related to the arbitrary character of the choice of projective resolutions

Published on 10 Feb 2012 - 20:32

450

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$\mathrm{Tor}$ functor not left exact

Published on 23 Feb 2012 - 17:44

List Question

Climbing up a filtration of a sheaf to show noetherian vanishing cohomology implies affine

$\operatorname{Ext}^1(M,R/m)=0$ iff $M$ is projective

Ext group as derived functor of Hom

What is the Tor functor?

Derived category and so on

Meaning of "efface" in "effaceable functor" and "injective effacement"

Derived functor of a derived functor

Is $\mathbf{R}F(Z^\bullet)$ equal to $\mathbf{K}F(Z^\bullet)$ when $Z^\bullet$ consists of $F$-acyclic objects?

Derived functors of torsion functor

Question about derived functors

Derived functors are Kan extensions

Right derived functor of diagonal morphism equals direct image on line bundles?

Left-derived functors

Some questions about the Tor functor as a two-variable functor related to the arbitrary character of the choice of projective resolutions

$\mathrm{Tor}$ functor not left exact

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