F02FKF Example Program Data 20 : nx, matrix order n = nx*nx 8 : nev, number of eigenvalues requested 20 : ncv, size of subspace 1.0 : sigma, shift (want eigenvalues close to sigma) 0 : print level 500 : maximum number of itrerations 1 : mode (0 = regular, 1 = shifted inverse) 0 : imon (0 = no monitoring, 1 = monitoring on)