num::opnorm1

Defined in header <linear/condition.hpp>

template <std::floating_point T>
T opnorm1(const mat<T> &A);  // (1)

real opnorm1(const spmat &A);  // (2)

(1) \(\|A\|_1\), the largest absolute column sum.

(2) \(\|A\|_1\) of a sparse matrix.