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Approximate matrix and tensor diagonalization by unitary transformations: convergence of Jacobi-type algorithms

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arxiv 1905.12295 v3 pith:P4IPRNVN submitted 2019-05-29 math.OC cs.NAmath.NA

Approximate matrix and tensor diagonalization by unitary transformations: convergence of Jacobi-type algorithms

classification math.OC cs.NAmath.NA
keywords convergenceunitaryalgorithmapproximatediagonalizationresultstensorstransformations
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a gradient-based Jacobi algorithm for a class of maximization problems on the unitary group, with a focus on approximate diagonalization of complex matrices and tensors by unitary transformations. We provide weak convergence results, and prove local linear convergence of this algorithm.The convergence results also apply to the case of real-valued tensors.

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