id: 02232796 dt: j an: 02232796 au: Zhang, Linjie; Nodera, Takashi ti: A new adaptive restart for GMRES($m$) method. so: ANZIAM J. 46C, Proc. 2004, C409-C425, electronic only (2005). py: 2005 pu: Australian Mathematical Society; Cambridge University Press, Cambridge la: EN cc: ut: adaptive restart; GMRES; Krylov subspace methods; harmonic Ritz values; numerical experiments ci: li: http://anziamj.austms.org.au/V46/CTAC2004/Zhan/ ab: Summary: GMRES($m$) is a Krylov subspace method for solving nonsymmetric systems of linear equations. The difficulty of this method lies in choosing the appropriate restart cycle $m$. We propose a new strategy for the adaptive restart for GMRES($m$) which is based on using the difference of the Ritz and harmonic Ritz values. We also report on numerical experiments which show that this new approach is both effective and robust. rv: