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Jeremy Rickard's user avatar
Jeremy Rickard's user avatar
Jeremy Rickard's user avatar
Jeremy Rickard
  • Member for 12 years, 8 months
  • Last seen this week
  • Bristol, United Kingdom
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396 Answers

Score Activity Newest
8 votes
Accepted

Minimal Hausdorffness reversed

8 votes
Accepted

Universal maps between topological spaces

8 votes

On the groups of order $p(p^2+1)$

8 votes

Groups like symmetric group

8 votes

An operation on binary strings

8 votes

Direct product of rings

8 votes
Accepted

Picard-surjectivity and Morita-equivalence

8 votes
Accepted

How to find a finite splitting field $K$ for $G$ such that every indecomposable $KG$-module is absolutely indecomposable

8 votes
Accepted

Categories of modules generated under coproducts by a small set?

8 votes
Accepted

Induced map in K-theory by a "trivial" bimodule

8 votes

How exotic can an infinite biproduct in an additive category be?

8 votes

Are free functors usually injective up to isomorphism?

8 votes
Accepted

Examples of permutation $\mathbb{Z}G$-modules which admit non-isomorphic permutation bases?

8 votes
Accepted

Let $R$ be an associative ring with 1. Let $M$ be a product if infinitely many copies of $R$, viewed as a left $R$-module. Is $M$ locally free?

8 votes
Accepted

Left exact functor $F$ preserves quasi-isomorphism between $F$-acyclics

7 votes
Accepted

What goes wrong with the Brauer construction for a module over a complete DVR?

7 votes
Accepted

Minimality of the Koszul resolution

7 votes
Accepted

A particular morphism being zero in the singularity category

7 votes
Accepted

Semi-projective complexes of modules over a finite group

7 votes
Accepted

Is the fixed subring a symmetric algebra?

7 votes
Accepted

How to prove a lemma of Rouquier on the dimension of triangulated categories?

7 votes
Accepted

Dimension of division rings coming from indecomposable modules

7 votes
Accepted

Split cofibrations up to quasi-isomorphism

7 votes
Accepted

Resolution of short exact sequences by the split ones

7 votes
Accepted

Stable equivalence and triangulated equivalence of self-injective algebras

7 votes
Accepted

About G-modules with good filtrations

7 votes
Accepted

Zero divisors of the form $1+x+y$ in the rational group algebra

7 votes
Accepted

Is such a map null-homotopic?

7 votes

For a ring R, does $GL_n(R)$ embed into $GL_m(F)$ for some field F?

7 votes

Beyond Brauer's theorem

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