Log Bott localization with non-isolated lci zero varieties

This paper establishes a logarithmic Bott localization formula for global holomorphic sections of TX(logD)T_X(-\log D) on a compact complex manifold with a simple normal crossings divisor, extending the theory to non-isolated zero schemes that are local complete intersections and providing a current-theoretic formulation that identifies the local residue with a Coleff-Herrera current.

Maurício Corrêa, Elaheh Shahsavaripour2026-03-10🔢 math

Maximal Ancillarity, Semiparametric Efficiency, and the Elimination of Nuisances

This paper resolves the non-uniqueness of maximal ancillary σ\sigma-fields by introducing a sequence-based asymptotic framework that enables semiparametrically efficient inference through finite-sample nuisance elimination, specifically utilizing center-outward residual ranks and signs to construct distribution-free restrictions of locally asymptotically normal experiments without requiring nuisance parameter estimation.

Marc Hallin, Bas J. M. Werker, Bo Zhou2026-03-10🔢 math

A note on diffusive/random-walk behaviour in Metropolis--Hastings algorithms

This paper establishes that Metropolis–Hastings algorithms with non-geometrically ergodic proposals and high acceptance rates at large states fail to be geometrically ergodic, while further demonstrating that guided walk variants converge twice as fast as random walk versions for polynomial-tailed targets but exhibit similar ballistic speeds to random walks for strictly convex potentials.

Yuxin Liu, Peiyi Zhou, Samuel Livingstone2026-03-10🔢 math