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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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answered
Using the mapping cone to show that a chain map defines a stable equivalence between two symmetric algebras
comment
What conditions on an Abelian category allow members of a direct sum to be determined entirely by their components?
Regarding your last remark, the category that I constructed is AB5, so won’t be a counterexample.
answered
Vanishing of $\operatorname{Ext}_R^{1}(M,R)$ when $R$ is a Gorenstein local ring of dimension $1$ and $M$ is not finitely generated
awarded
 Enlightened
awarded
 Nice Answer
comment
In an abelian category with no nontrivial Serre subcategories, does every short exact sequence split?
Or more generally, take the category of finite length modules for a non-semisimple local ring.
answered
In an abelian category with no nontrivial Serre subcategories, does every short exact sequence split?
comment
A question about freeness of a certain class of abelian groups
@Mostafa I've added a proof.
revised
A question about freeness of a certain class of abelian groups
added 362 characters in body
answered
A question about freeness of a certain class of abelian groups
comment
Where can I find a table of the exponents of the sporadic groups?
It wasn’t me, @StevenStadnicki deserves the credit. All I did was correct the table header from “Order” to “Exponent”.
revised
Where can I find a table of the exponents of the sporadic groups?
"Order" should be "Exponent"
reviewed
Approve
Where can I find a table of the exponents of the sporadic groups?
revised
The indecomposable bundle on an elliptic curve
spelling
comment
The indecomposable bundle on an elliptic curve
It would be helpful if you said what paper you’re referring to, and gave a reference to where in the paper this bundle is defined.
answered
Group such that factors in any product-decomposition are reducible
reviewed
Leave Open
Coming out as transgender in the mathematical community
comment
Does there exist a faithful exact embedding of $D^b(\dim(N)) \to D^b(\dim(N-1))$
"Fourier-Mukai", maybe? But even that doesn't make much grammatical sense without the word "transform".
comment
Does there exist a faithful exact embedding of $D^b(\dim(N)) \to D^b(\dim(N-1))$
What does FM mean?
revised
A depth version of a conjecture of Yamagata
added 1 character in body
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