Posted by Maciej Janowicz on August 03, 1998 at 12:22:31:

Dear Netlib Users,

Does anybody know of an efficient FORTRAN 77 code

solving systems of linear equations (in complex

numbers) *without the matrix of the system explicitly

given* but with an option to make it possible

to provide a subroutine/function which

calculates entries of this matrix when they are

needed ?

I have a fast but low-memory computer and I cannot

store large matrices.

The system I have to solve contain ~10^3

equations, its matrix is rather full, unfortunately.

Thanks a lot in advance

Sincerely,

M. Janowicz