** Estimate the 1-norm condition number. **

** Higham's modification of Hager's method. **

** [C, V] = CONDEST(A) computes a lower bound C for the 1-norm condition **

** number of A, and a vector V such that NORM (A*V)=NORM (A)*NORM (V)/C. **

** V is an approximate null vector if C is large. **

** **