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Jeremy Rickard

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Name Jeremy Rickard
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30
Are there any nontrivial abelian categories with only finitely many objects?
12
Lifting isomorphisms between derived categories
11
For a monoid with zero $M$, how many additive operations on $M$ can there be making $M$ a ring?
10
Uncertainty principle on finite groups
9
Bass' stable range of $\mathbf Z[X]$
9
Intersection of all normalizers
8
Monotonic bijections of rational numbers
7
An operation on binary strings
6
lenght of a finite group versus number of conjugacy classes of subgroups
6
The number in the join of conjugate class and centralizer
5
About some kind of “converse” of a theorem from Galois theory
5
“Sums-compact” objects = f.g. objects in categories of modules?
5
Standard selfinjective algebras and Auslander-Reiten quiver
5
Baer’s criterion for projective modules
5
Exponent of the cohomology of a product of groups
4
Stable equivalence and triangle stable equivalence of selfinjective algebras
4
Permutation characters and regular orbits
4
Free Module with a Projective Sub- Module, and Tensor Products
3
Detecting and counting free direct summands
3
Properties of quotient categories.
2
example re torsionless quotients of abelian groups
2
Free and cellular G-action implies free G-complex?
2
Inductive vs projective limit of sequence of split surjections
1
Explicit indecomposable monomorphism of finitely generated non-indecomposable Abelian groups.
1
Is Khovanov’s Frobenius algebra self-dual over the integers?
0
Subspace generated by positive vectors
0
Let $M$ be a $R$-Bimodule that happens to be projective, is its associated left $R \otimes R^{op}$-module projective too?
-1
Cocomplete but not complete abelian category

 

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