!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
! version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
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***S/P SETTRIV
*
SUBROUTINE SETTRIV(A,B,C,V,W,N)
*
#include "impnone.cdk"
INTEGER N
REAL A(N),B(N),C(N),V(N),W(N)
*
*Author
* J. Cote (RPN 1983)
*
*Revision
* 001 J. Cote RPN(Nov 1984)SEF version documentation
* 002 M. Lepine - RFE model code revision project (Feb 87)
*
*Object
* to prepare the solution on a tri-diagonal matrix problem
*
*Arguments
*
* - Input -
* A lower-diagonal of the matrix
* B diagonal of the matrix
* C upper diagonal of the matrix
*
* - Output -
* V work space
* W work space
*
* - Input -
* N matrix dimension
*
*Notes
* The solution is obtained with 'SOLTRIV'. The matrix must
* be a dominant diagonal. Refer to R.S. Varga's "Matrix
* Iterative Analysis", pp.195 FF
*
**
*
INTEGER J
*
V(1)=1.0/B(1)
DO 1 J=2,N
W(J-1)=C(J-1)*V(J-1)
1 V(J)=1.0/(B(J)-A(J)*W(J-1))
*
RETURN
END