cptsl.f
SUBROUTINE CPTSL (N, D, E, B)
C***BEGIN PROLOGUE CPTSL
C***PURPOSE Solve a positive definite tridiagonal linear system.
C***LIBRARY SLATEC (LINPACK)
C***CATEGORY D2D2A
C***TYPE COMPLEX (SPTSL-S, DPTSL-D, CPTSL-C)
C***KEYWORDS LINEAR ALGEBRA, LINPACK, MATRIX, POSITIVE DEFINITE, SOLVE,
C TRIDIAGONAL
C***AUTHOR Dongarra, J., (ANL)
C***DESCRIPTION
C
C CPTSL given a positive definite tridiagonal matrix and a right
C hand side will find the solution.
C
C On Entry
C
C N INTEGER
C is the order of the tridiagonal matrix.
C
C D COMPLEX(N)
C is the diagonal of the tridiagonal matrix.
C On output D is destroyed.
C
C E COMPLEX(N)
C is the offdiagonal of the tridiagonal matrix.
C E(1) through E(N-1) should contain the
C offdiagonal.
C
C B COMPLEX(N)
C is the right hand side vector.
C
C On Return
C
C B contains the solution.
C
C***REFERENCES J. J. Dongarra, J. R. Bunch, C. B. Moler, and G. W.
C Stewart, LINPACK Users' Guide, SIAM, 1979.
C***ROUTINES CALLED (NONE)
C***REVISION HISTORY (YYMMDD)
C 780814 DATE WRITTEN
C 890505 REVISION DATE from Version 3.2
C 891214 Prologue converted to Version 4.0 format. (BAB)
C 900326 Removed duplicate information from DESCRIPTION section.
C (WRB)
C 920501 Reformatted the REFERENCES section. (WRB)
C***END PROLOGUE CPTSL