Stefan Schreieder

collaborators

4 papers

math.AG2026

On the degree of subvarieties on abelian varieties

Philip Engel, Stefan Schreieder

Let $(X, I^)$ be a very general principally polarized abelian variety of dimension $g$ , and consider the minimal cohomology class $I^¸_{k} = [I^]^{k} / k!$ for $k < g$ . We show that the minima…

math.AG2026

Divisibility phenomena in motivic Bloch--Ogus theory

Jean-Louis Colliot-ThÃ©lÃ¨ne, Stefan Schreieder

Let X be a smooth projective variety over a field k. For k separably closed, we prove that the subgroup of unramified classes in the Milnor K-group $K_{i}^{M} (k (X))$ of the function fi…

math.AG2026

Rationality of hypersurfaces

Stefan Schreieder

We survey recent developments on rationality problems for algebraic varieties, with a particular emphasis on cycle-theoretic and combinatorial methods and their applications to hyp…

math.AG2025

Optimality of the Prym-Tyurin construction for $A_{6}$

Philip Engel, Olivier de Gaay Fortman, Stefan Schreieder

We prove that on a very general principally polarized abelian 6-fold, the smallest multiple of the minimal curve class which can be represented by an algebraic cycle is 6.

On the degree of subvarieties on abelian varieties

Divisibility phenomena in motivic Bloch--Ogus theory

Rationality of hypersurfaces

Optimality of the Prym-Tyurin construction for A6​

Optimality of the Prym-Tyurin construction for $A_{6}$