la_lapack::gtcon Interface Reference

GTCON: estimates the reciprocal of the condition number of a complex tridiagonal matrix A using the LU factorization as computed by CGTTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))). More...

Public Member Functions
pure subroutine	cgtcon (norm, n, dl, d, du, du2, ipiv, anorm, rcond, work, info)
	la_cgtcon
pure subroutine	dgtcon (norm, n, dl, d, du, du2, ipiv, anorm, rcond, work, iwork, info)
	la_dgtcon
	la_qgtcon
pure subroutine	sgtcon (norm, n, dl, d, du, du2, ipiv, anorm, rcond, work, iwork, info)
	la_sgtcon
	la_wgtcon
pure subroutine	zgtcon (norm, n, dl, d, du, du2, ipiv, anorm, rcond, work, info)
	la_zgtcon

Detailed Description

GTCON: estimates the reciprocal of the condition number of a complex tridiagonal matrix A using the LU factorization as computed by CGTTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).

Member Function/Subroutine Documentation

cgtcon()

pure subroutine la_lapack::gtcon::cgtcon	(	character, intent(in)	norm,
		integer(ilp), intent(in)	n,
		complex(sp), dimension(*), intent(in)	dl,
		complex(sp), dimension(*), intent(in)	d,
		complex(sp), dimension(*), intent(in)	du,
		complex(sp), dimension(*), intent(in)	du2,
		integer(ilp), dimension(*), intent(in)	ipiv,
		real(sp), intent(in)	anorm,
		real(sp), intent(out)	rcond,
		complex(sp), dimension(*), intent(out)	work,
		integer(ilp), intent(out)	info )

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dgtcon()

pure subroutine la_lapack::gtcon::dgtcon	(	character, intent(in)	norm,
		integer(ilp), intent(in)	n,
		real(dp), dimension(*), intent(in)	dl,
		real(dp), dimension(*), intent(in)	d,
		real(dp), dimension(*), intent(in)	du,
		real(dp), dimension(*), intent(in)	du2,
		integer(ilp), dimension(*), intent(in)	ipiv,
		real(dp), intent(in)	anorm,
		real(dp), intent(out)	rcond,
		real(dp), dimension(*), intent(out)	work,
		integer(ilp), dimension(*), intent(out)	iwork,
		integer(ilp), intent(out)	info )

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la_cgtcon()

la_lapack::gtcon::la_cgtcon

la_dgtcon()

la_lapack::gtcon::la_dgtcon

la_qgtcon()

la_lapack::gtcon::la_qgtcon

la_sgtcon()

la_lapack::gtcon::la_sgtcon

la_wgtcon()

la_lapack::gtcon::la_wgtcon

la_zgtcon()

la_lapack::gtcon::la_zgtcon

sgtcon()

pure subroutine la_lapack::gtcon::sgtcon	(	character, intent(in)	norm,
		integer(ilp), intent(in)	n,
		real(sp), dimension(*), intent(in)	dl,
		real(sp), dimension(*), intent(in)	d,
		real(sp), dimension(*), intent(in)	du,
		real(sp), dimension(*), intent(in)	du2,
		integer(ilp), dimension(*), intent(in)	ipiv,
		real(sp), intent(in)	anorm,
		real(sp), intent(out)	rcond,
		real(sp), dimension(*), intent(out)	work,
		integer(ilp), dimension(*), intent(out)	iwork,
		integer(ilp), intent(out)	info )

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zgtcon()

pure subroutine la_lapack::gtcon::zgtcon	(	character, intent(in)	norm,
		integer(ilp), intent(in)	n,
		complex(dp), dimension(*), intent(in)	dl,
		complex(dp), dimension(*), intent(in)	d,
		complex(dp), dimension(*), intent(in)	du,
		complex(dp), dimension(*), intent(in)	du2,
		integer(ilp), dimension(*), intent(in)	ipiv,
		real(dp), intent(in)	anorm,
		real(dp), intent(out)	rcond,
		complex(dp), dimension(*), intent(out)	work,
		integer(ilp), intent(out)	info )

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The documentation for this interface was generated from the following file:

• la_lapack.f90