> spasmous wrote: > >> For a general matrix (rectangular, non-symmetric) is there an iterative >> method for solving J*x=b that only uses multiplies J*v and no transpose >> multiples J'*u? I know there are many methods based on J'*J. > > Does the conjugate gradient method fit your criteria? > > http://en.wikipedia.org/wiki/Conjugate_gradient > > > Hope this helps, > Rui Maciel
But that requires the matrix to be symmetric. However, maybe GMRES would work. But I did not entirely understand his problem setting.