LAPACK  3.9.0
LAPACK: Linear Algebra PACKage
Functions
real
LAPACK » Positive Definite tridiagonal Matrix » Computational routines
Collaboration diagram for real:

Functions

subroutine sptcon (N, D, E, ANORM, RCOND, WORK, INFO)
 SPTCON More...
 
subroutine spteqr (COMPZ, N, D, E, Z, LDZ, WORK, INFO)
 SPTEQR More...
 
subroutine sptrfs (N, NRHS, D, E, DF, EF, B, LDB, X, LDX, FERR, BERR, WORK, INFO)
 SPTRFS More...
 
subroutine spttrs (N, NRHS, D, E, B, LDB, INFO)
 SPTTRS More...
 
subroutine sptts2 (N, NRHS, D, E, B, LDB)
 SPTTS2 solves a tridiagonal system of the form AX=B using the L D LH factorization computed by spttrf. More...
 

Detailed Description

This is the group of real computational functions for PT matrices

spttrs
subroutine spttrs(N, NRHS, D, E, B, LDB, INFO)
SPTTRS
Definition: spttrs.f:111
sbdsqr
subroutine sbdsqr(UPLO, N, NCVT, NRU, NCC, D, E, VT, LDVT, U, LDU, C, LDC, WORK, INFO)
SBDSQR
Definition: sbdsqr.f:242
isamax
integer function isamax(N, SX, INCX)
ISAMAX
Definition: isamax.f:73
sscal
subroutine sscal(N, SA, SX, INCX)
SSCAL
Definition: sscal.f:81
xerbla
subroutine xerbla(SRNAME, INFO)
XERBLA
Definition: xerbla.f:62
lsame
logical function lsame(CA, CB)
LSAME
Definition: lsame.f:55
slaset
subroutine slaset(UPLO, M, N, ALPHA, BETA, A, LDA)
SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.
Definition: slaset.f:112
slamch
real function slamch(CMACH)
SLAMCH
Definition: slamch.f:70
sptts2
subroutine sptts2(N, NRHS, D, E, B, LDB)
SPTTS2 solves a tridiagonal system of the form AX=B using the L D LH factorization computed by spttrf...
Definition: sptts2.f:104
ilaenv
integer function ilaenv(ISPEC, NAME, OPTS, N1, N2, N3, N4)
ILAENV
Definition: tstiee.f:83
spttrf
subroutine spttrf(N, D, E, INFO)
SPTTRF
Definition: spttrf.f:93
saxpy
subroutine saxpy(N, SA, SX, INCX, SY, INCY)
SAXPY
Definition: saxpy.f:91