English

Lossless Strichartz and spectral projection estimates on unbounded manifolds

Analysis of PDEs 2026-02-09 v3 Classical Analysis and ODEs Spectral Theory

Abstract

We prove new lossless Strichartz and spectral projection estimates on asymptotically hyperbolic surfaces, and, in particular, on all convex cocompact hyperbolic surfaces. In order to do this, we also obtain log-scale lossless Strichartz and spectral projection estimates on manifolds of uniformly bounded geometry with nonpositive and negative sectional curvatures, extending the recent works of the first two authors for compact manifolds. We are able to use these along with known L2L^2-local smoothing and new L2LqL^2 \to L^q half-localized resolvent estimates to obtain our lossless bounds.

Keywords

Cite

@article{arxiv.2504.07238,
  title  = {Lossless Strichartz and spectral projection estimates on unbounded manifolds},
  author = {Xiaoqi Huang and Christopher D. Sogge and Zhongkai Tao and Zhexing Zhang},
  journal= {arXiv preprint arXiv:2504.07238},
  year   = {2026}
}

Comments

Revised version to appear in GAFA, 81 pages. Corrections as well as new global results under natural conditions at the bottom of the spectrum