List questions from derived-functors

Published on 30 Mar 2012 - 0:37

215

Views

Is there a general formula for $\operatorname{Ext}_{\mathbb{Z}/(p^n)}^i(\mathbb{Z}/(p),\mathbb{Z}/(p))$?

Published on 30 Apr 2012 - 9:34

193

Views

Is there an easy formula for $\operatorname{Tor}_i^{\mathbb{Z}/(p^n)}(\mathbb{Z}/(p),\mathbb{Z}/(p))$?

Published on 01 May 2012 - 0:38

189

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Example computation of $\operatorname{Tor_i}{(M,N)}$

Published on 11 Jun 2012 - 13:59

529

Views

Question about the $\mathrm{Tor}$ functor

Published on 24 Jul 2012 - 7:28

127

Views

Map from $\operatorname{Ext}^1(M,M)$ to $H^1(G, \operatorname{End}(M))$

Published on 25 Mar 2026 - 23:10

964

Views

Composition of derived functors and comparison between hypercohomology and sheaf cohomology

Published on 12 Aug 2012 - 17:29

466

Views

Computing Derived Pullback on the Complement

Published on 15 Aug 2012 - 20:29

730

Views

Adapted classes of objects and left (right) exact functors

Published on 18 Aug 2012 - 17:55

541

Views

Cartan-Eilenberg resolutions, adapted classes and acyclic resolutions

Published on 26 Mar 2026 - 17:30

308

Views

What does $Tor^{R}_n(M,N)$ represent?

Published on 16 Sep 2012 - 0:57

343

Views

Why are these two functors isomorphic?

Published on 18 Sep 2012 - 1:17

859

Views

Computing left derived functors from acyclic complexes (not resolutions!)

Published on 28 Dec 2012 - 19:31

332

Views

Example where Čech and derived functor cohomologies don't agree.

Published on 20 Feb 2013 - 21:22

679

Views

Sheaves on $\mathbb{P}^n \times \mathbb{P}^m$, and a commutation relation for derived functors of global sections and tensor products on it.

Published on 26 Feb 2013 - 14:30

List Question

Why do universal $\delta$-functors annihilate injectives?

Is there a general formula for $\operatorname{Ext}_{\mathbb{Z}/(p^n)}^i(\mathbb{Z}/(p),\mathbb{Z}/(p))$?

Is there an easy formula for $\operatorname{Tor}_i^{\mathbb{Z}/(p^n)}(\mathbb{Z}/(p),\mathbb{Z}/(p))$?

Example computation of $\operatorname{Tor_i}{(M,N)}$

Question about the $\mathrm{Tor}$ functor

Map from $\operatorname{Ext}^1(M,M)$ to $H^1(G, \operatorname{End}(M))$

Composition of derived functors and comparison between hypercohomology and sheaf cohomology

Computing Derived Pullback on the Complement

Adapted classes of objects and left (right) exact functors

Cartan-Eilenberg resolutions, adapted classes and acyclic resolutions

What does $Tor^{R}_n(M,N)$ represent?

Why are these two functors isomorphic?

Computing left derived functors from acyclic complexes (not resolutions!)

Example where Čech and derived functor cohomologies don't agree.

Sheaves on $\mathbb{P}^n \times \mathbb{P}^m$, and a commutation relation for derived functors of global sections and tensor products on it.

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