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math.AP2026
Observability Inequalities for Degenerate Schrödinger Equations via a Shape Approximation Method
Dong-Hui Yang, Hongli Sun, Weijia Wu +1
We study a two-dimensional Schrödinger equation with a boundary degeneracy. More precisely, the diffusion matrix is given by , so that t…
math.OC2026
On Controllability of a Class of N -dimensional Hyperbolic Equations with Internal Single-point Degeneracy
Donghui Yang, Weijia Wu
This paper explores the controllability of a class of N-dimensional hyperbolic equations featuring a single interior degenerate point. Firstly, we establish the well-posedness of t…