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- W2093054271 abstract "Given a matrix A, determine δ(A) = inf{∥A−p∥:0≤p≤1} and find a p for which the infimum is attained. We slove this problem for arbitrary A in the Frobenius norm and for normal matrices in the spectral norm. A necessary and sufficient condition is presented for a normal matrix to have a unique approximant in the spectral norm." @default.
- W2093054271 created "2016-06-24" @default.
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- W2093054271 date "1995-08-01" @default.
- W2093054271 modified "2023-09-26" @default.
- W2093054271 title "On a question of P.R. Halmos" @default.
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- W2093054271 doi "https://doi.org/10.1080/03081089508818398" @default.
- W2093054271 hasPublicationYear "1995" @default.
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