Question: Below is a snippet from the article Experience with a matrix norm estimator by N. Higham. First, we recall the original algorithm of Hager [7],

 Below is a snippet from the article Experience with a matrixnorm estimator by N. Higham. First, we recall the original algorithm ofHager [7], on which the estimators in (9) are based. Our notation

Below is a snippet from the article Experience with a matrix norm estimator by N. Higham. First, we recall the original algorithm of Hager [7], on which the estimators in (9) are based. Our notation is as follows: e is the vector of all ones, e; is the jth column of the identity matrix, and & sign(y) means i 1 or -1 according as Yi > 0 or Yi 0 or Yi

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