User Bugs Bunny

2 votes

An algebra map between Hopf algebras that does not commute with the counit

answered Sep 18 at 10:16

5 votes

Tensor functor between rigid tensor categories preserves $\text{Hom}$-objects

answered Sep 7 at 13:14

8 votes

Accepted

In the rep theory of Quantum Double, why does the fusion of 2 "pure fluxes" yield a "pure charge"?

answered Aug 31 at 16:09

2 votes

Is the preimage of a Hopf subalgebra a Hopf subalgebra?

answered Aug 31 at 12:52

12 votes

Derived category of varieties and derived category of quiver algebras

answered Nov 26, 2012 at 8:49

1 vote

Quantum group associated to a reductive group

answered Jun 23 at 7:51

3 votes

Kähler structure on cotangent bundle?

answered Jun 2, 2010 at 9:46

3 votes

Accepted

Tannakian fundamental group of automorphic representations

answered Nov 25, 2021 at 17:33

3 votes

Accepted

Is a smallness condition necessary in the Tannaka reconstruction theorem?

answered Nov 25, 2021 at 12:11

20 votes

A ring for which the category of left and right modules are distinct

answered Nov 4, 2021 at 6:57

3 votes

Accepted

The name of special 16-dimensional hypercomplex number

answered Jun 25, 2019 at 12:19

4 votes

An algebra which is a direct sum of simple sub-bimodules over a subalgebra

answered Jun 13, 2021 at 15:44

3 votes

Introduction to W-Algebras/Why W-algebras?

answered Apr 23, 2021 at 6:54

2 votes

Number of rings with additive group $(\mathbb{Z}_{16})^2$. A341547(16) in OEIS

answered Apr 9, 2021 at 8:34

6 votes

Accepted

Embedding of a division algebra into a matrix algebra over its centre

answered Apr 7, 2021 at 19:57

1 vote

When is a nilpotent Lie algebra isomorphic to the associated graded of its lower central series?

answered Mar 10, 2021 at 20:28

4 votes

Non-cosemisimple duals of pointed Hopf algebras

answered Mar 10, 2021 at 20:10

2 votes

Accepted

Universal property of induced representation

answered Jun 16, 2020 at 8:43

8 votes

Langlands dual group in math vs. Goddard-Nyuts-Olive dual group in physics

answered May 30, 2020 at 8:29

5 votes

Accepted

Gelfand's trick (Gelfand's lemma) in positive characteristic?

answered Jun 27, 2019 at 8:58

3 votes

Accepted

Irreducibility of product bicomodules

answered Apr 14, 2020 at 4:53

1 vote

Morphisms of two fully reducible representations of a group

answered Apr 10, 2020 at 16:26

3 votes

Real representations of SO(n) and U(n)

answered Apr 2, 2020 at 6:33

1 vote

Invariant subspaces and isotypic decomposition (reference request)

answered Mar 31, 2020 at 6:47

3 votes

Accepted

Examples of strict monoidal categories and monoidal categories with nontrivial associators

answered Mar 29, 2020 at 8:35

-8 votes

Abelian category equivalent to a non-abelian category

answered Mar 26, 2020 at 14:27

4 votes

Accepted

Isometry type of alcoves in affine Coxeter complexes

answered Mar 26, 2020 at 13:49

3 votes

Accepted

Semidirect product of metaplectic group and Heisenberg group

answered Mar 24, 2020 at 6:05

3 votes

Accepted

The Lie algebra of the subgroup of $GL(n)$ preserving a given variety

answered Mar 23, 2020 at 7:05

2 votes

Is the Jordan decomposition for reductive groups algebraic?

answered Mar 21, 2020 at 14:08

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191 Answers

An algebra map between Hopf algebras that does not commute with the counit

Tensor functor between rigid tensor categories preserves $\text{Hom}$-objects

In the rep theory of Quantum Double, why does the fusion of 2 "pure fluxes" yield a "pure charge"?

Is the preimage of a Hopf subalgebra a Hopf subalgebra?

Derived category of varieties and derived category of quiver algebras

Quantum group associated to a reductive group

Kähler structure on cotangent bundle?

Tannakian fundamental group of automorphic representations

Is a smallness condition necessary in the Tannaka reconstruction theorem?

A ring for which the category of left and right modules are distinct

The name of special 16-dimensional hypercomplex number

An algebra which is a direct sum of simple sub-bimodules over a subalgebra

Introduction to W-Algebras/Why W-algebras?

Number of rings with additive group $(\mathbb{Z}_{16})^2$. A341547(16) in OEIS

Embedding of a division algebra into a matrix algebra over its centre

When is a nilpotent Lie algebra isomorphic to the associated graded of its lower central series?

Non-cosemisimple duals of pointed Hopf algebras

Universal property of induced representation

Langlands dual group in math vs. Goddard-Nyuts-Olive dual group in physics

Gelfand's trick (Gelfand's lemma) in positive characteristic?

Irreducibility of product bicomodules

Morphisms of two fully reducible representations of a group

Real representations of SO(n) and U(n)

Invariant subspaces and isotypic decomposition (reference request)

Examples of strict monoidal categories and monoidal categories with nontrivial associators

Abelian category equivalent to a non-abelian category

Isometry type of alcoves in affine Coxeter complexes

Semidirect product of metaplectic group and Heisenberg group

The Lie algebra of the subgroup of $GL(n)$ preserving a given variety

Is the Jordan decomposition for reductive groups algebraic?