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Nonnegative Matrix Factorization Requires Irrationality
Author(s) -
Dmitry Chistikov,
Stefan Kiefer,
Ines Marušić,
Mahsa Shirmohammadi,
James Worrell
Publication year - 2017
Publication title -
siam journal on applied algebra and geometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.052
H-Index - 15
ISSN - 2470-6566
DOI - 10.1137/16m1078835
Subject(s) - nonnegative matrix , non negative matrix factorization , mathematics , matrix (chemical analysis) , combinatorics , irrationality , matrix decomposition , dimension (graph theory) , irrational number , factorization , symmetric matrix , pure mathematics , algebra over a field , rationality , algorithm , physics , eigenvalues and eigenvectors , chemistry , philosophy , geometry , quantum mechanics , chromatography , epistemology
Nonnegative matrix factorization (NMF) is the problem of decomposing a given nonnegative n x mmatrix M into a product of a nonnegative n x d matrix W and a nonnegative d x m matrix H. Alongstanding open question, posed by Cohen and Rothblum in 1993, is whether a rational matrix Malways has an NMF of minimal inner dimension d whose factors W and H are also rational. Weanswer this question negatively, by exhibiting a matrix for which W and H require irrational entries

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