lagtm Interface

public interface lagtm

LAGTM performs a matrix-vector product of the form B := alpha * A * X + beta * B where A is a tridiagonal matrix of order N, B and X are N by NRHS matrices, and alpha and beta are real scalars, each of which may be 0., 1., or -1.

Subroutines

public pure subroutine clagtm(trans, n, nrhs, alpha, dl, d, du, x, ldx, beta, b, ldb)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	trans
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	nrhs
real(kind=sp),	intent(in)			::	alpha
complex(kind=sp),	intent(in)			::	dl(*)
complex(kind=sp),	intent(in)			::	d(*)
complex(kind=sp),	intent(in)			::	du(*)
complex(kind=sp),	intent(in)			::	x(ldx,*)
integer(kind=ilp),	intent(in)			::	ldx
real(kind=sp),	intent(in)			::	beta
complex(kind=sp),	intent(inout)			::	b(ldb,*)
integer(kind=ilp),	intent(in)			::	ldb

public pure subroutine dlagtm(trans, n, nrhs, alpha, dl, d, du, x, ldx, beta, b, ldb)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	trans
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	nrhs
real(kind=dp),	intent(in)			::	alpha
real(kind=dp),	intent(in)			::	dl(*)
real(kind=dp),	intent(in)			::	d(*)
real(kind=dp),	intent(in)			::	du(*)
real(kind=dp),	intent(in)			::	x(ldx,*)
integer(kind=ilp),	intent(in)			::	ldx
real(kind=dp),	intent(in)			::	beta
real(kind=dp),	intent(inout)			::	b(ldb,*)
integer(kind=ilp),	intent(in)			::	ldb

public pure subroutine slagtm(trans, n, nrhs, alpha, dl, d, du, x, ldx, beta, b, ldb)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	trans
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	nrhs
real(kind=sp),	intent(in)			::	alpha
real(kind=sp),	intent(in)			::	dl(*)
real(kind=sp),	intent(in)			::	d(*)
real(kind=sp),	intent(in)			::	du(*)
real(kind=sp),	intent(in)			::	x(ldx,*)
integer(kind=ilp),	intent(in)			::	ldx
real(kind=sp),	intent(in)			::	beta
real(kind=sp),	intent(inout)			::	b(ldb,*)
integer(kind=ilp),	intent(in)			::	ldb

public pure subroutine zlagtm(trans, n, nrhs, alpha, dl, d, du, x, ldx, beta, b, ldb)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	trans
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	nrhs
real(kind=dp),	intent(in)			::	alpha
complex(kind=dp),	intent(in)			::	dl(*)
complex(kind=dp),	intent(in)			::	d(*)
complex(kind=dp),	intent(in)			::	du(*)
complex(kind=dp),	intent(in)			::	x(ldx,*)
integer(kind=ilp),	intent(in)			::	ldx
real(kind=dp),	intent(in)			::	beta
complex(kind=dp),	intent(inout)			::	b(ldb,*)
integer(kind=ilp),	intent(in)			::	ldb

Module Procedures

public interface stdlib_clagtm()

Arguments

None

public interface stdlib_dlagtm()

Arguments

None

public interface stdlib_slagtm()

Arguments

None

public interface stdlib_zlagtm()

Arguments

None