Abstract
We prove genuinely sharp two-sided global estimates for heat kernels on all compact rank-one symmetric spaces. This generalizes the authors’ recent result obtained for a Euclidean sphere of arbitrary dimension. Furthermore, similar heat kernel bounds are shown in the context of classical Jacobi expansions, on a ball and on a simplex. These results are more precise than the qualitatively sharp Gaussian estimates proved recently by several authors.
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Communicated by Loukas Grafako.
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Research supported by the National Science Centre of Poland within the Project OPUS 2017/27/B/ST1/01623. Tomasz Z. Szarek was supported also by the Foundation for Polish Science via the START Scholarship.
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Nowak, A., Sjögren, P. & Szarek, T.Z. Genuinely sharp heat kernel estimates on compact rank-one symmetric spaces, for Jacobi expansions, on a ball and on a simplex. Math. Ann. 381, 1455–1476 (2021). https://doi.org/10.1007/s00208-021-02185-8
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DOI: https://doi.org/10.1007/s00208-021-02185-8