On the Rigid-Ruling Folding of Curved Creases: Conjugate-Net Preserving Isometric Deformations of Semi-Discrete Globally Developable Conjugate-Nets

This paper investigates rigid-ruling folding motions of curved creases by deriving conditions for the foldability of developable semi-discrete conjugate nets and applying these findings to enable the sequential construction of foldable patterns and characterize the compatibility of planar and constant fold-angle creases.

Klara Mundilova2026-03-09🔢 math

Minimizers for boundary reactions: renormalized energy, location of singularities, and applications

This paper demonstrates that, unlike the Casten-Holland and Matano theorem for interior reactions, nonconstant stable solutions for boundary reactions can exist in convex domains such as squares and regular polygons (but not circles), with their existence and the location of boundary singularities determined by a new renormalized energy function derived from the domain's conformal structure.

Xavier Cabre, Neus Consul, Matthias Kurzke2026-03-09🔢 math

The Popov's Algorithm with Optimal Bounded Stepsize for Generalized Monotone Variational Inequalities

This paper establishes and proves the tightness of the optimal bounded stepsize limits for Popov's algorithm in solving generalized monotone variational inequalities, demonstrating a bound of 12L\frac{1}{2L} for constrained cases and an improved 13L\frac{1}{\sqrt{3}L} for unconstrained cases through a novel Lyapunov-type function analysis.

Nhung Hong Nguyen, Thanh Quoc Trinh, Phan Tu Vuong2026-03-09🔢 math

Inner Lipschitz approximation in o-minimal structures

This paper demonstrates that in o-minimal structures, every definable mapping that is Lipschitz with respect to the inner metric can be approximated by C1\mathscr{C}^1 (or C\mathscr{C}^\infty if the structure admits smooth cell decomposition) mappings with arbitrarily close derivative bounds, a result achieved through the construction of partitions of unity with sharp derivative estimates and extended to outer Lipschitz mappings.

Nhan Nguyen, Anna Valette, Guillaume Valette2026-03-09🔢 math

Schauder estimates for flat solutions to a class of fully nonlinear elliptic PDEs with Dini continuous data: a geometric tangential approach

This paper establishes local Schauder estimates for flat viscosity solutions to a class of non-convex fully nonlinear elliptic PDEs with Dini continuous data and linear drift terms using geometric tangential techniques, while also deriving an Evans-Krylov type estimate and characterizing the nodal sets of such solutions.

Junior da Silva Bessa, João Vitor da Silva, Laura Ospina2026-03-09🔢 math

Can deleterious mutations surf deterministic population waves? A functional law of large numbers for a spatial model of Muller's ratchet

This paper establishes a functional law of large numbers for a spatial model of Muller's ratchet, proving that the system converges to an infinite system of partial differential equations that rigorously determine population spreading speeds and demonstrate that deleterious mutations can indeed surf deterministic population waves.

João Luiz de Oliveira Madeira, Marcel Ortgiese, Sarah Penington2026-03-09🔢 math

Uniform sum-product phenomenon for algebraic groups and Bremner's conjecture

This paper combines additive combinatorics and Diophantine geometry to establish a uniform sum-product phenomenon for one-dimensional algebraic groups over C\mathbb{C}, thereby resolving Bremner's conjecture on arithmetic progressions in elliptic curve coordinates and improving upon existing results by Bays--Breuillard regarding Elekes--Szabó-type theorems.

Joseph Harrison, Akshat Mudgal, Harry Schmidt2026-03-09🔢 math