public interface sbtrd
SBTRD reduces a real symmetric band matrix A to symmetric
tridiagonal form T by an orthogonal similarity transformation:
Q**T * A * Q = T.
Subroutines
Arguments
| Type |
Intent | Optional | Attributes |
|
Name |
|
|
character(len=1),
|
intent(in) |
|
|
:: |
vect |
|
|
character(len=1),
|
intent(in) |
|
|
:: |
uplo |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
n |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
kd |
|
|
real(kind=dp),
|
intent(inout) |
|
|
:: |
ab(ldab,*) |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
ldab |
|
|
real(kind=dp),
|
intent(out) |
|
|
:: |
d(*) |
|
|
real(kind=dp),
|
intent(out) |
|
|
:: |
e(*) |
|
|
real(kind=dp),
|
intent(inout) |
|
|
:: |
q(ldq,*) |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
ldq |
|
|
real(kind=dp),
|
intent(out) |
|
|
:: |
work(*) |
|
|
integer(kind=ilp),
|
intent(out) |
|
|
:: |
info |
|
Arguments
| Type |
Intent | Optional | Attributes |
|
Name |
|
|
character(len=1),
|
intent(in) |
|
|
:: |
vect |
|
|
character(len=1),
|
intent(in) |
|
|
:: |
uplo |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
n |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
kd |
|
|
real(kind=sp),
|
intent(inout) |
|
|
:: |
ab(ldab,*) |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
ldab |
|
|
real(kind=sp),
|
intent(out) |
|
|
:: |
d(*) |
|
|
real(kind=sp),
|
intent(out) |
|
|
:: |
e(*) |
|
|
real(kind=sp),
|
intent(inout) |
|
|
:: |
q(ldq,*) |
|
|
integer(kind=ilp),
|
intent(in) |
|
|
:: |
ldq |
|
|
real(kind=sp),
|
intent(out) |
|
|
:: |
work(*) |
|
|
integer(kind=ilp),
|
intent(out) |
|
|
:: |
info |
|
Module Procedures
