Cohen's theorem in tensor triangular geometry

Tobias Barthel

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arXiv · 2505.15786

Cohen's theorem in tensor triangular geometry

Tobias Barthel

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Abstract

A theorem of Cohen from 1950 states that a commutative ring is Noetherian if and only if every prime ideal is finitely generated. In this note, we establish analogues of this result in tensor triangular geometry. In particular, for an essentially small tensor triangulated category $\mathscr{K}$ with weakly Noetherian spectrum, we show that every prime ideal in $\mathscr{K}$ can be generated by finitely many objects if and only if the set of prime ideals of $\mathscr{K}$ is finite.

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Tobias Barthel. 2025-05-21. Cohen's theorem in tensor triangular geometry. https://arxiv.org/abs/2505.15786

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