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Logarithmic Sobolev Inequalities on Homogeneous Spaces

https://doi.org/10.1093/imrn/rnae205

Gordina, Maria; Luo, Liangbing (September 2024, International Mathematics Research Notices)

Abstract We consider sub-Riemannian manifolds which are homogeneous spaces equipped with a sub-Riemannian structure induced by a transitive action by a Lie group. Then the corresponding sub-Laplacian is not an elliptic but a hypoelliptic operator. We study logarithmic Sobolev inequalities with respect to the hypoelliptic heat kernel measure on such spaces. We show that the logarithmic Sobolev constant can be chosen to depend only on the Lie group acting transitively on such a space but the constant is independent of the action of its isotropy group. This approach allows us to track the dependence of the logarithmic Sobolev constant on the geometry of the underlying space, in particular we show that the constant is independent of the dimension of the underlying spaces in several examples.
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Infinitesimal conformal restriction and unitarizing measures for Virasoro algebra

https://doi.org/10.1016/j.matpur.2025.103669

Gordina, Maria; Qian, Wei; Wang, Yilin (March 2025, Journal de Mathématiques Pures et Appliquées)

Free, publicly-accessible full text available March 1, 2026
Matrix-valued modified logarithmic Sobolev inequality for sub-Laplacian on $SU (2)$

https://doi.org/10.1016/j.jfa.2024.110453

Gao, Li; Gordina, Maria (July 2024, Journal of Functional Analysis)

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