Local and local-to-global Principles for zero-cycles on geometrically Kummer K3K3 surfaces

This paper proves a conjecture by Raskind, Spiess, Colliot-Thélène, and Sansuc regarding the structure of the Chow group of zero-cycles on geometrically Kummer K3K3 surfaces over pp-adic fields and provides the first unconditional evidence for a local-to-global principle for zero-cycles on such surfaces by demonstrating that the Brauer-Manin obstruction is the sole obstruction to weak approximation in specific cases.

Evangelia Gazaki, Jonathan LoveTue, 10 Ma🔢 math

A gluing construction of singular solutions for a fully non-linear equation in conformal geometry

This paper demonstrates that the classical Mazzeo-Pacard gluing method can be successfully extended to construct singular solutions for the fully non-linear σ2\sigma_2-Yamabe equation in dimensions n>4n>4, provided the singular set consists of disjoint closed submanifolds with dimensions strictly less than (nn2)/2(n-\sqrt{n}-2)/2.

María Fernanda Espinal, María del Mar GonzálezTue, 10 Ma🔢 math

Rigidity of spin fill-ins with non-negative scalar curvature

This paper establishes new mean curvature rigidity theorems for spin fill-ins with non-negative scalar curvature by employing two distinct spinorial techniques—an APS boundary value problem extension and an index-theoretic comparison—to resolve questions posed by Miao and Gromov, while also deriving a novel Witten-type mass inequality for asymptotically Schwarzschild manifolds.

Simone Cecchini, Sven Hirsch, Rudolf ZeidlerTue, 10 Ma🔢 math

Model structure arising from one hereditary complete cotorsion pair on extriangulated categories

This paper establishes a correspondence between model structures and a single hereditary complete cotorsion pair on weakly idempotent complete extriangulated categories, thereby generalizing previous results by Beligiannis-Reiten and Cui et al., and provides methods to construct such model structures from silting objects and co-tt-structures.

Jiangsheng Hu, Dongdong Zhang, Pu Zhang, Panyue ZhouTue, 10 Ma🔢 math