Marc Stephan

collaborators

3 papers

math.AT2025

Steenrod closed $C_{3}$ -invariant parameter ideals in the mod 2 cohomology of $Z /2 \times Z /2$

Henrik RÃ¼ping, Marc Stephan

For the nontrivial action by the cyclic group $C_{3}$ of order $3$ on the graded polynomial ring $F_{2} [a, b]$ , we classify the $C_{3}$ -invariant parameter ideals that are closed…

math.CT2025

Generation time for biexact functors and Koszul objects in triangulated categories

Janina C. Letz, Marc Stephan

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 lev…

math.AC2024

An equivariant BGG correspondence and perfect complexes for extensions by $Z /2 \times Z /2$

Henrik RÃ¼ping, Marc Stephan

We provide an equivariant extension of Carlsson's BGG correspondence in characteristic two. As an application we classify perfect cochain complexes of $(\mathbb{Z}/2\times \mathbb{…

Steenrod closed C3​-invariant parameter ideals in the mod 2 cohomology of Z/2×Z/2

Generation time for biexact functors and Koszul objects in triangulated categories

An equivariant BGG correspondence and perfect complexes for extensions by Z/2×Z/2

Steenrod closed $C_{3}$ -invariant parameter ideals in the mod 2 cohomology of $Z /2 \times Z /2$

An equivariant BGG correspondence and perfect complexes for extensions by $Z /2 \times Z /2$