Geometric early warning indicator from stochastic separatrix structure in a random two-state ecosystem model

This paper proposes a robust geometric early warning indicator based on the width of the stochastic separatrix in a two-state ecosystem model, which successfully predicts rapid under-ice phytoplankton blooms in the Arctic where conventional critical slowing down signals fail due to strong noise or limited data.

Yuzhu Shi, Larissa Serdukova, Yayun Zheng, Sergei Petrovskii, Valerio Lucarini2026-03-11🔢 math

Linearized Boundary Control Method for Damping Reconstruction in an Acoustic Inverse Boundary Value Problem

This paper develops a linearized boundary control method to reconstruct unknown damping perturbations in the damped wave equation from the linearized Neumann-to-Dirichlet map, providing stability estimates and a validated numerical algorithm for constant backgrounds in any dimension while establishing increasing stability for non-constant backgrounds in dimensions three and higher.

Tianyu Yang, Yang Yang2026-03-11🔢 math

Small noise asymptotics for a class of jump-diffusions with heavy tails for large times

This paper establishes that for positive recurrent Lévy diffusions driven by scaled Brownian motion and α\alpha-stable processes ($1<\alpha<2$) in the small noise regime, the large-time limiting behavior of the one-dimensional marginal distribution is determined by the optimal value of a deterministic control problem featuring both continuous and impulse controls.

Sumith Reddy Anugu, Siva R. Athreya, Vivek S. Borkar2026-03-11🔢 math