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arxiv:2011.04366

Derivatives of partial eigendecomposition of a real symmetric matrix for degenerate cases

Published on Nov 9, 2020
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Abstract

The paper derives forward and backward derivatives for partial eigendecomposition of real symmetric matrices under degeneracy, enabling stable computation without resolving repeated eigenvalues.

This paper presents the forward and backward derivatives of partial eigendecomposition, i.e. where it only obtains some of the eigenpairs, of a real symmetric matrix for degenerate cases. The numerical calculation of forward and backward derivatives can be implemented even if the degeneracy never disappears and only some eigenpairs are available.

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