Heat trace and Riesz means with a large Robin parameter
Abstract
We consider the Laplacian with Robin boundary conditions on a smooth Riemannian manifold with boundary and investigate the behavior of various spectral quantities as the Robin parameter approaches infinity. Although the spectrum, heat trace, and Riesz means converge pointwise to their Dirichlet analogues, the asymptotics of these quantities as the spectral parameter approaches infinity, or as time approaches zero, do not. The remainders in the usual asymptotic expansions are not bounded as the Robin parameter approaches infinity. Our main result is a two-term asymptotic expansion for the Robin heat trace that depends jointly on the time variable and the Robin parameter, with a remainder that satisfies a uniform bound independent of the Robin parameter. We apply this result to obtain a similar two-term asymptotic expansion for Riesz means of order at least one, again with a remainder bound independent of the Robin parameter.
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BibTeX
@misc{sher2026heat,
title = {{Heat trace and Riesz means with a large Robin parameter}},
author = {David A. Sher},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.40804},
eprint = {2610.40804},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.40804},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Heat trace and Riesz means with a large Robin parameter
AU - David A. Sher
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.40804
UR - https://arxiv.org/abs/2610.40804
AB - We consider the Laplacian with Robin boundary conditions on a smooth Riemannian manifold with boundary and investigate the behavior of various spectral quantities as the Robin parameter approaches infinity. Although the spectrum, heat trace, and Riesz means converge pointwise to their Dirichlet analogues, the asymptotics of these quantities as the spectral parameter approaches infinity, or as time approaches zero, do not. The remainders in the usual asymptotic expansions are not bounded as the Robin parameter approaches infinity. Our main result is a two-term asymptotic expansion for the Robin heat trace that depends jointly on the time variable and the Robin parameter, with a remainder that satisfies a uniform bound independent of the Robin parameter. We apply this result to obtain a similar two-term asymptotic expansion for Riesz means of order at least one, again with a remainder bound independent of the Robin parameter.
ER -