Abstract :
[en] We characterize the absolute continuity of the law and the Malliavin-Sobolev regularity of random nodal volumes associated with smooth Gaussian fields on generic C2 manifolds with arbitrary dimension. Our results extend and generalize the seminal contribution by Angst and Poly (2020) about stationary fields on Euclidean spaces and cover, in particular, the case of two-dimensional manifolds, possibly with boundary and corners. The main tools exploited in the proofs include the use of Gaussian measures on Banach spaces, Morse theory, and the characterization of Malliavin-Sobolev spaces in terms of ray absolute continuity. Several examples are analyzed in detail.
Funding text :
Received by the editors May 1, 2024, and, in revised form, November 4, 2024, and January 15, 2025. 2020 Mathematics Subject Classification. Primary 60G15, 60H07, 60G60, 58K05, 28A75. This research was supported by the Luxembourg National Research Fund (Grant: 021/16236290/HDSA).
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