2 papers
math.AP2025
Sharp spectral-cluster restriction bounds for orthonormal systems
Changbiao Jian, Xing Wang, Yakun Xi
Let be a smooth submanifold of a compact Riemannian manifold . We study the restriction to of densities generated by -orthonormal systems of eigenfunctions whose…
math.AP2024
Hearing the shape of a drum by knocking around
Xing Wang, Emmett L. Wyman, Yakun Xi
We study a variation of Kac's question, "Can one hear the shape of a drum?" if we allow ourselves access to some additional information. In particular, we allow ourselves to ``hear…