English

Spectral projection estimates restricted to uniformly embedded submanifolds

Differential Geometry 2025-11-05 v1 Analysis of PDEs Spectral Theory

Abstract

Let MM be a manifold with nonpositive sectional curvature and bounded geometry, and let Σ\Sigma be a uniformly embedded submanifold of M.M. We estimate the L2(M)Lq(Σ)L^2(M)\to L^q(\Sigma) norm of a log\log-scale spectral projection operator. It is a generalization of result of X. Chen to noncompact cases. We also prove sharp spectral projection estimates of spectral windows of any small size restricted to nontrapped geodesics on even asymptotically hyperbolic surfaces with bounded geometry and curvature pinched below 0.

Keywords

Cite

@article{arxiv.2511.02012,
  title  = {Spectral projection estimates restricted to uniformly embedded submanifolds},
  author = {Zhexing Zhang},
  journal= {arXiv preprint arXiv:2511.02012},
  year   = {2025}
}
R2 v1 2026-07-01T07:20:09.392Z