Twisted homological stability for handlebody mapping class groups

This paper establishes twisted homological stability for handlebody mapping class groups with respect to both genus and the number of marked boundary discs by utilizing the categorical framework of Randal-Williams and Wahl and introducing the concept of coefficient bisystems, thereby extending previous results and enabling applications to moduli spaces of 3-dimensional handlebodies with tangential structures.

Erik Lindell, Arthur Soulié2026-03-04🔢 math

Numerical boundary flux functions that give provable bounds for nonlinear initial boundary value problems with open boundaries

This paper presents a strategy for interpreting nonlinear characteristic-type penalty terms as numerical boundary flux functions, derived from a symmetric boundary matrix formulation of entropy flux, to guarantee provable entropy and energy stability for high-order discontinuous Galerkin methods solving nonlinear hyperbolic initial boundary value problems with open boundaries.

Andrew R. Winters, David A. Kopriva, Jan Nordström2026-03-04🔢 math

Homological properties of invariant rings of permutation groups

This paper investigates the homological properties of invariant rings under permutation groups, establishing that key invariants like the aa-invariant and quasi-Gorenstein property are independent of the field characteristic (except for specific shift behaviors in characteristic two), proving the Shank–Wehlau conjecture for permutation subgroups, and characterizing the ring of differential operators on these invariants.

Aryaman Maithani2026-03-04🔢 math

Facet-Defining Inequalities for the Angle-Based DC Optimal Transmission Switching Formulation

This paper challenges the prevailing view that tightening voltage angle bounds in the Direct-Current Optimal Transmission Switching problem requires solving an intractable longest path problem by presenting a novel polyhedral analysis that derives facet-defining inequalities to construct an extended formulation for the convex hull of the angle-based relaxation.

Behnam Jabbari-Marand, Adolfo R. Escobedo2026-03-04🔢 math