User Jeremy Rickard

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Grothendieck group of triangulated categories

answered Oct 23, 2022 at 13:24

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Commutativity of $\operatorname{Hom}$ and $\varprojlim$

answered Aug 20, 2020 at 12:52

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What should I call a "differential" which cubes, rather than squares, to zero?

answered Mar 26, 2020 at 15:31

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Is there a finite dimensional algebra with left finitistic dimension different from its right finitistic dimension?

answered Nov 11, 2020 at 18:30

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Endomorphism ring of trivial source modules for abelian p-groups

answered Oct 7, 2020 at 12:56

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$\left[x,y\right]$ as a product of palindromes of even length?

answered Nov 19, 2013 at 16:12

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Is this modified bound quiver algebra necessarily representation-finite?

answered Dec 18, 2015 at 9:29

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Are indecomposable representations of a finite group of Lie type absolutely indecomposable?

answered Mar 24, 2018 at 19:56

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Sum of subfields of $\mathbb{C}$

answered Dec 27, 2018 at 19:26

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Is there a compact generated triangulated category which does not have a compact generator?

answered Jul 16, 2016 at 8:15

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Local endomorphism rings and indecomposable modules

answered Dec 19, 2017 at 11:13

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The projective covers of Artinian module

answered Dec 12, 2017 at 11:50

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Local property of split exact sequence

answered Jun 13, 2017 at 16:09

8 votes

Direct sum of injective modules is injective

answered May 17, 2017 at 10:25

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Has anyone seen these posets before?

answered Aug 9, 2017 at 4:00

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indecomposable module over a local ring

answered Dec 17, 2017 at 11:19

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Is an open subset of a rigid space rigid?

answered Nov 7, 2017 at 10:08

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Freeness of tensor product

answered Dec 7, 2016 at 12:58

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Gorenstein symmetric conjecture for arbitrary rings

answered Feb 27, 2019 at 10:42

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Existence of a multiplication bifunctor for the category of groups

answered Jan 30, 2020 at 10:50

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Abelian category which is not well-powered

answered Feb 9, 2020 at 11:24

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Limit of split short exact sequences

answered Feb 21, 2020 at 12:17

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question about infinite global dimension

answered May 8, 2018 at 8:55

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Adjoints of scalar extension and scalar coextension

answered Jun 4, 2018 at 8:52

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Path algebras are formally smooth

answered Jun 17, 2018 at 10:12

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On decomposition of finite Abelian groups

answered Oct 13, 2018 at 10:36

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Symmetric algebras of given dimension

answered Nov 6, 2015 at 16:22

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Rank versus free-rank of a module

answered Oct 21, 2015 at 17:51

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Tensor product of monomorphisms is a monomorphism?

answered Feb 28, 2016 at 17:35

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the number of indecomposable modules of finite groups over finite fields of a fixed dimension

answered Jan 24, 2015 at 17:40

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396 Answers

Grothendieck group of triangulated categories

Commutativity of $\operatorname{Hom}$ and $\varprojlim$

What should I call a "differential" which cubes, rather than squares, to zero?

Is there a finite dimensional algebra with left finitistic dimension different from its right finitistic dimension?

Endomorphism ring of trivial source modules for abelian p-groups

$\left[x,y\right]$ as a product of palindromes of even length?

Is this modified bound quiver algebra necessarily representation-finite?

Are indecomposable representations of a finite group of Lie type absolutely indecomposable?

Sum of subfields of $\mathbb{C}$

Is there a compact generated triangulated category which does not have a compact generator?

Local endomorphism rings and indecomposable modules

The projective covers of Artinian module

Local property of split exact sequence

Direct sum of injective modules is injective

Has anyone seen these posets before?

indecomposable module over a local ring

Is an open subset of a rigid space rigid?

Freeness of tensor product

Gorenstein symmetric conjecture for arbitrary rings

Existence of a multiplication bifunctor for the category of groups

Abelian category which is not well-powered

Limit of split short exact sequences

question about infinite global dimension

Adjoints of scalar extension and scalar coextension

Path algebras are formally smooth

On decomposition of finite Abelian groups

Symmetric algebras of given dimension

Rank versus free-rank of a module

Tensor product of monomorphisms is a monomorphism?

the number of indecomposable modules of finite groups over finite fields of a fixed dimension