Modular Nahm sums for symmetrizable matrices of indices (2,,2,1)({2,\ldots, 2},1) and (1,,1,2)({1,\ldots, 1},2)

This paper presents three families of modular Nahm sums for symmetrizable matrices of indices (2,,2,1)({2,\ldots, 2},1) and (1,,1,2)({1,\ldots, 1},2) with arbitrary rank r2r\geq 2, extending previous results for low ranks and utilizing these families to construct two vector-valued automorphic forms.

Julia Q. D. Du, Kathy Q. Ji, Erin Y. Y. Shen, Clara X. Y. Xu2026-03-10🔢 math

Algebraic representatives of the ratios ζ(2n+1)/π2n\zeta(2n+1)/\pi^{2n} and β(2n)/π2n1\beta(2n)/\pi^{2n-1}

This paper provides explicit closed formulae for the even polynomials Ξn\Xi_n and Λn\Lambda_n, which represent the ratios β(2n)/π2n1\beta(2n)/\pi^{2n-1} and ζ(2n+1)/π2n\zeta(2n+1)/\pi^{2n}, by expressing them in terms of Eulerian numbers and analyzing their structural properties to aid future investigations into the arithmetic nature of these ratios.

Luc Ramsès Talla Waffo2026-03-10🔢 math

Scalable multitask Gaussian processes for complex mechanical systems with functional covariates

This paper introduces a scalable multitask Gaussian process model with a fully separable kernel structure that effectively handles functional covariates and correlated tasks, demonstrating superior accuracy and computational efficiency over single-task approaches in predicting the behavior of complex mechanical systems like riveted assemblies with limited data.

Razak Christophe Sabi Gninkou (UPHF, INSA Hauts-De-France, CERAMATHS), Andrés F. López-Lopera (IMAG, LEMON, UM), Franck Massa (LAMIH, INSA Hauts-De-France, UPHF), Rodolphe Le Riche (LIMOS, UCA [2017-2020], ENSM ST-ETIENNE, CNRS)2026-03-10🔢 math

The half-wave maps equation on T\mathbb{T}: Global well-posedness in H1/2H^{1/2} and almost periodicity

This paper establishes global well-posedness in the critical energy space H1/2H^{1/2} and proves almost periodicity in time for the half-wave maps equation on the one-dimensional torus by leveraging its integrable Lax pair structure to derive explicit solution formulae and a general stability principle that extends to matrix-valued cases and companion results on the real line.

Patrick Gérard, Enno Lenzmann2026-03-10🔢 math

A Mathematical Theory of Agency and Intelligence

This paper introduces "bipredictability" (P) as a fundamental, bounded measure of shared information between observations, actions, and outcomes to distinguish mere agency from true intelligence, demonstrating that current AI systems lack the self-monitoring feedback loops necessary for adaptive learning and proposing a thalamocortical-inspired architecture to restore it.

Wael Hafez, Chenan Wei, Rodrigo Pena, Amir Nazeri, Cameron Reid2026-03-10🔢 math