A hybrid reduced-order and high-fidelity discontinuous Galerkin Spectral Element framework for large-scale PMUT array simulations

This paper presents a novel, scalable computational framework implemented in the open-source SPEED software that combines model order reduction with a high-fidelity Discontinuous Galerkin Spectral Element Method to efficiently simulate the coupled electromechanical-acoustic behavior of large-scale Piezoelectric Micromachined Ultrasonic Transducer (PMUT) arrays.

Paola F. Antonietti, Omer M. O. Abdalla, Michelangelo G. Garroni, Ilario Mazzieri, Nicola Parolini2026-03-09🔢 math

Homogeneity of the Lévy collapse from the perspective of Fraïssé theory

This paper establishes that the Fraïssé limit of the class of Boolean algebras of size less than a strongly inaccessible cardinal λ\lambda (under regular embeddings) shares the same completion as the Lévy collapse, while also providing a direct proof that the collapsing algebra of density κ\kappa cannot be expressed as the union of a κ\kappa-chain of regular sub-algebras of density less than κ\kappa.

Ziemowit Kostana2026-03-09🔢 math

Solving the Line-Based Dial-a-Ride Problem by Generating Stopping Patterns

This paper introduces a new variant of the line-based dial-a-ride problem without time windows, proposes a novel MILP formulation and a branch-and-price algorithm based on generating profitable stopping patterns, and demonstrates through computational experiments that both the exact method and a scalable root node heuristic effectively solve large instances with high efficiency and small optimality gaps.

Antonio Lauerbach, Sven Mallach, Kendra Reiter, Marie Schmidt, Michael Stiglmayr2026-03-09🔢 math

One-sided large deviations for the ground-state energy of spin glasses

This paper establishes a large-deviation principle for the maximal energy of a spin glass with ±1\pm 1 spins by deriving a Parisi-type formula for fractional moments and leveraging convex duality to show that the rate function is asymptotically quadratic near its minimum if and only if an external magnetic field is present.

Hong-Bin Chen, Alice Guionnet, Justin Ko, Bertrand Lacroix-A-Chez-Toine, Jean-Christophe Mourrat2026-03-09🔢 math

Computing Stationary Distribution via Dirichlet-Energy Minimization by Coordinate Descent

This paper presents an optimization-based formulation of the Red Light Green Light (RLGL) algorithm for computing stationary distributions of large Markov chains via Dirichlet-energy minimization and coordinate descent, thereby clarifying its behavior, establishing exponential convergence for specific chain classes, and suggesting practical scheduling strategies to accelerate convergence.

Konstantin Avrachenkov, Lorenzo Gregoris, Nelly Litvak2026-03-09🔢 math

Spinor moving frame, type II superparticle quantization, hidden SU(8)SU(8) symmetry of linearized 10D supergravity, and superamplitudes

This paper utilizes a covariant spinor moving frame quantization of type IIA and IIB superparticles to reveal a hidden SU(8)SU(8) symmetry in linearized supergravity, demonstrating that both theories can be described by identical analytic on-shell superfields and superamplitudes while highlighting specific challenges in extending this formalism to include D0-branes.

Igor Bandos, Mirian Tsulaia2026-03-09🔢 math