Geometric statistics with subspace structure preservation for SPD matrices

• URL: http://arxiv.org/abs/2407.03382v1
• Date: Tue, 2 Jul 2024 22:22:36 GMT
• Title: Geometric statistics with subspace structure preservation for SPD matrices
• Authors: Cyrus Mostajeran, Nathaël Da Costa, Graham Van Goffrier, Rodolphe Sepulchre,
• Abstract summary: We present a framework for the processing of SPD-valued data that preserves subspace structures. This is achieved through the use of the Thompson geometry of the semidefinite cone.
• Score: 1.749935196721634
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: We present a geometric framework for the processing of SPD-valued data that preserves subspace structures and is based on the efficient computation of extreme generalized eigenvalues. This is achieved through the use of the Thompson geometry of the semidefinite cone. We explore a particular geodesic space structure in detail and establish several properties associated with it. Finally, we review a novel inductive mean of SPD matrices based on this geometry.

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