Leung, Andrew Yee TakAndrew Yee TakLeungChan, J. K. W.Chan, C. W.2022-05-072022-05-071998https://repository.sfu.edu.hk/handle/sfu/3099The solutions of large eigensystems having cluster, multiple, or defective eigenvalues by inverse iteration using one trial vector at a time are of interest. The Rayleigh quotient is used as shift. New formulas for each particular case are derived for definite convergence. Six numerical examples, including three-multiple defective eigenvalues, are given.enjournal article10.1177/107754639800400603