I am lokking for FORTRAN subroutine to solve Periodic Block tridiagonal Matrix. can any one send or suggest a link. ! found one in the written in book of "computational fluid dynamics and Heat transfer" but facing some problem to implemnet it or may be there is some error in the given code. if some one already tested it plz let me where i need to correct it.

Thanks a lot

Abdullah

http://www3.interscience.wiley.com/c...TRY=1&SRETRY=0

The subroutine is added, in text, as an appendix. It is a single precision subroutine, changing it to double precision is a little work.

Thanks Zamfir,

But i 've no permission to access the journal. Plz if you can do sent it to me at scholar.cm@gmail.com

best wishes