User Jeremy Rickard - TeX - LaTeX Stack Exchange

Jeremy Rickard

Member for 1 year, 9 months
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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?