Yunlei Wang

collaborators

4 papers

math.CA2026

Sparse supports of lattice eigenfunctions: quantitative growth and algebraic rigidity

Yunlei Wang

We study how sparsely a nonzero discrete harmonic function on the standard lattice $Z^{d}$ can be supported. Let $Q_{n}^{(d)} = {- n, \dots, n}^{d}$ , and let $m_{d} (n)$ denote the l…

math.AP2026

Approximate null-controllability of discrete heat equations with potentials on lattices

Yann Bourroux, Philippe Jaming, Yunlei Wang

We investigate approximate null-controllability for semi-discrete heat equations on the lattice $h Z^{d}$ with a potential. By establishing spectral inequalities for the disc…

math.AP2026

Observability and Semiclassical Control for SchrÃ¶dinger Equations on Non-compact Hyperbolic Surfaces

Xin Fu, Yulin Gong, Yunlei Wang

We study the observability of the SchrÃ¶dinger equation on $X$ , a non-compact covering space of a compact hyperbolic surface $M$ . Using a generalized Bloch theory, functions on $X$ …

math.AP2026

Curved Ingham inequalities and observability of the toroidal Schr{Ã¶}dinger equation

Bernhard H Haak, Philippe Jaming, Ming Wang +1

We prove that solutions of the toroidal Schr{Ã¶}dinger equation can be observed from suitably curved space-time trajectories, thus of zero Lebesgue measure. To do so, we establish…