Yunlei Wang

collaborators

3 papers

math.AP2026

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

Bernhard H Haak, Philippe Jaming, Ming Wang +1

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

math.AP2026

Observability and Semiclassical Control for Schrödinger Equations on Non-compact Hyperbolic Surfaces

Xin Fu, Yulin Gong, Yunlei Wang

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

math.CA2024

On L1-norms for non-harmonic trigonometric polynomials with sparse frequencies

Philippe Jaming, Karim Kellay, Chadi Saba +1

In this paper we show that, if an increasing sequence $Λ = (λ_{k})_{k \in Z}$ has gaps going to infinity $λ_{k + 1} - λ_{k} \to + \infty$ when $k \to \pm \infty$ , then for every $T > 0$ and…