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Matrix column norm : colnorm colNorm

colnorm (or colNorm) takes as argument a matrix A = aj, k.
colnorm (or colNorm) returns $ \max_{j}^{}$($ \sum_{k}^{}$(| aj, k|)).
Input :
colnorm([[1,2],[3,-4]])
or
colNorm([[1,2],[3,-4]])
Output :
6
Indeed : max(1 + 3, 2 + 4) = 6



giac documentation written by Renée De Graeve and Bernard Parisse