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Sums of orthogonal projections

✍ Scribed by Choi, Man-Duen; Wu, Pei Yuan


Book ID
121841366
Publisher
Elsevier Science
Year
2014
Tongue
English
Weight
776 KB
Volume
267
Category
Article
ISSN
0022-1236

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We describe the set of all (Ξ±, n), for which the scalar complex matrix Ξ±I n is a sum of k idempotent Hermitian matrices, and get the minimal number of summands for each Ξ±I n .