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Geometric Jensen-Shannon Divergence Between Gaussian Measures On Hilbert Space

12 June 2025
Minh Ha Quang
Frank Nielsen
ArXiv (abs)PDFHTML
Main:42 Pages
Bibliography:2 Pages
Abstract

This work studies the Geometric Jensen-Shannon divergence, based on the notion of geometric mean of probability measures, in the setting of Gaussian measures on an infinite-dimensional Hilbert space. On the set of all Gaussian measures equivalent to a fixed one, we present a closed form expression for this divergence that directly generalizes the finite-dimensional version. Using the notion of Log-Determinant divergences between positive definite unitized trace class operators, we then define a Regularized Geometric Jensen-Shannon divergence that is valid for any pair of Gaussian measures and that recovers the exact Geometric Jensen-Shannon divergence between two equivalent Gaussian measures when the regularization parameter tends to zero.

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@article{quang2025_2506.10494,
  title={ Geometric Jensen-Shannon Divergence Between Gaussian Measures On Hilbert Space },
  author={ Minh Ha Quang and Frank Nielsen },
  journal={arXiv preprint arXiv:2506.10494},
  year={ 2025 }
}
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