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The geometry of low-rank Kalman filters

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abstract

An important property of the Kalman filter is that the underlying Riccati flow is a contraction for the natural metric of the cone of symmetric positive definite matrices. The present paper studies the geometry of a low-rank version of the Kalman filter. The underlying Riccati flow evolves on the manifold of fixed rank symmetric positive semidefinite matrices. Contraction properties of the low-rank flow are studied by means of a suitable metric recently introduced by the authors.

fields

stat.ML 1

years

2026 1

verdicts

UNVERDICTED 1

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  • Computation-Aware Kalman Filtering with Model Selection for Neural Dynamics stat.ML · 2026-05-31 · unverdicted · none · ref 23 · internal anchor

    Introduces CASSM, a computation-aware state-space model extending Kalman filtering with model selection for scale-imbalanced neural recordings, claiming competitive performance with deep networks and improved uncertainty calibration.