by Roy Mathias
SIAM J. Matrix Anal. Appl
http://www.math.wm.edu/~mathias/preprints/ps_zips/1997_012.ps.gz
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Abstract:
Abstract. Let Mn be the space of n \Theta n complex matrices and let k \Delta k 1 denote the spectral norm. Given matrices A = [a ij] and B = [b ij] of the same size we define their Hadamard product to be A ffi B = [a ij b ij]. We define the Hadamard operator norm of A 2 Mn by jjjAjjj 1 = maxfkA ffi Bk1: kBk1 1g: We show that jjjAjjj 1
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