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Jeremy Rickard
  • Member for 1 year, 9 months
  • Last seen this week
  • Bristol, United Kingdom
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Algebraist at the University of Bristol.

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71
$A$ is isomorphic to $A \oplus \mathbb{Z}^2$, but not to $A \oplus \mathbb{Z}$
55
Are there any nontrivial abelian categories with only finitely many objects?
49
Example of an unnatural isomorphism
46
Is it consistent with ZF that $V \to V^{\ast \ast}$ is always an isomorphism?
44
Do vector spaces without choice satisfy Cantor-Schroeder-Bernstein?
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