Generation time for biexact functors and Koszul objects in triangulated categories

This paper concerns the generation time that measures the number of cones necessary to obtain an object in a triangulated category from another object. This invariant is called level. We establish level inequalities for enhanced triangulated categories: One inequality concerns biexact functors of topological triangulated categories, another Koszul objects. In particular, this extends inequalities for the derived tensor product from commutative algebra to enhanced tensor triangulated categories. We include many examples.

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Publication Details

Journal
Documenta Mathematica
Published
2025-03-20
DOI
https://doi.org/10.4171/dm/1000
Primary Topic
Algebraic structures and combinatorial models
Type
article
Field-Weighted Citation Impact
0.00
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article

Generation time for biexact functors and Koszul objects in triangulated categories

Marc Stephan, Janina C. Letz
Documenta Mathematica
Algebraic structures and combinatorial models
article

Generation time for biexact functors and Koszul objects in triangulated categories

Marc Stephan, Janina C. Letz
article en

Abstract

This paper concerns the generation time that measures the number of cones necessary to obtain an object in a triangulated category from another object. This invariant is called level. We establish level inequalities for enhanced triangulated categories: One inequality concerns biexact functors of topological triangulated categories, another Koszul objects. In particular, this extends inequalities for the derived tensor product from commutative algebra to enhanced tensor triangulated categories. We include many examples.

Documenta MathematicaVol. 30(2)
Bielefeld University (DE)
Openalex Percentile: Top 90%
Algebraic structures and combinatorial models
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