Uniqueness and nonlinear stability of positive entire solutions in parabolic-parabolic chemotaxis models with logistic source on bounded heterogeneous environments

This paper establishes the existence, uniqueness, and global asymptotic stability of positive entire solutions for a parabolic-parabolic chemotaxis model with logistic sources in heterogeneous bounded domains by identifying specific parameter regions where the system converges to a unique steady state regardless of initial conditions.

Tahir Bachar Issa2026-04-14🔢 math

Control of the Schrödinger equation in R3\mathbb{R}^3: The critical case

This paper establishes the local null controllability of the energy-critical nonlinear Schrödinger equation in R3\mathbb{R}^3 at the H1H^1 level by first proving well-posedness via Strichartz estimates, demonstrating linear controllability through the Hilbert uniqueness method, and finally extending the result to the nonlinear case using a perturbation argument.

Pablo Braz e Silva (UFPE), Roberto de A. Capistrano-Filho (UFPE), Jackellyny Dassy do Nascimento Carvalho (UFPE), David dos Santos Ferreira (IELC)2026-04-14🔢 math

A mathematical model for colloids deposition in porous media combined with a moving boundary at the microscale: Solvability and numerical simulation

This paper presents and analyzes a two-scale mathematical model for colloidal deposition in porous media with evolving microstructures, establishing weak solvability for the non-clogging regime and demonstrating through numerical simulations how local clogging impacts effective transport and storage properties.

Christos Nikolopoulos, Michael Eden, Adrian Muntean2026-04-14🔢 math

Inverse Obstacle Scattering from Multi-Frequency Near-Field Backscattering Data

This paper establishes a global uniqueness theorem for simultaneously reconstructing obstacle geometry and impedance boundary conditions from multi-frequency near-field backscattering data using high-frequency asymptotic expansions, and proposes a novel three-stage numerical framework that achieves robust and efficient reconstruction without solving the direct scattering problem.

Jialei Li, Xiaodong Liu2026-04-14🔢 math