15.4.3  ℓ^∞ matrix norm

The ℓ^∞ norm of a matrix A is max_j,k(|a_j,k|). The maxnorm command finds the ℓ^∞ norm of a matrix. (See also Section 14.1.1.)

• maxnorm takes A, a matrix.
• maxnorm(A returns the ℓ^∞ norm of A.

Example