Abstract
We consider the variation of canonical local periods on spherical varieties proposed by Sakellaridis–Venkatesh in families. We formulate conjectures for the rationality and meromorphic property of canonical local periods and establish these conjectures for strongly tempered spherical G-varieties without type N-roots when G is split.
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Acknowledgements
We express our sincere gratitude to Prof. Y. Tian for his consistent encouragement, and to Prof. A. Burungale for carefully reading earlier versions of the article. We are grateful to the anonymous referee whose comments helped us improve the article. In particular, we thank the referee for pointing out a gap in an earlier version and Prof. G. Moss for generously suggesting Proposition 4.20 to fix it. We thank Prof. J.-F. Dat for kindly answering our question on Jacquet modules and thank Prof. J. Yang for discussions on global applications. L. Cai is partially supported by NSFC Grant no. 11971254.
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Cai, L., Fan, Y. Families of canonical local periods on spherical varieties. Math. Ann. 389, 209–252 (2024). https://doi.org/10.1007/s00208-023-02642-6
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DOI: https://doi.org/10.1007/s00208-023-02642-6