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Representing the special linear group with block unitriangular matrices
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Journal Article
Representing the special linear group with block unitriangular matrices
2023
Overview
Abstract
We prove that every element of the special linear group can be represented as the product of at most six block unitriangular matrices, and that there exist matrices for which six products are necessary, independent of indexing. We present an analogous result for the general linear group. These results serve as general statements regarding the representational power of alternating linear updates. The factorizations and lower bounds of this work immediately imply tight estimates on the expressive power of linear affine coupling blocks in machine learning.
Publisher
Oxford University Press
Subject
