spgv Interface

public interface spgv

SPGV computes all the eigenvalues and, optionally, the eigenvectors of a real generalized symmetric-definite eigenproblem, of the form Ax=(lambda)Bx, ABx=(lambda)x, or BAx=(lambda)x. Here A and B are assumed to be symmetric, stored in packed format, and B is also positive definite.


Subroutines

public subroutine dspgv(itype, jobz, uplo, n, ap, bp, w, z, ldz, work, info)

Arguments

Type IntentOptional Attributes Name
integer(kind=ilp), intent(in) :: itype
character(len=1), intent(in) :: jobz
character(len=1), intent(in) :: uplo
integer(kind=ilp), intent(in) :: n
real(kind=dp), intent(inout) :: ap(*)
real(kind=dp), intent(inout) :: bp(*)
real(kind=dp), intent(out) :: w(*)
real(kind=dp), intent(out) :: z(ldz,*)
integer(kind=ilp), intent(in) :: ldz
real(kind=dp), intent(out) :: work(*)
integer(kind=ilp), intent(out) :: info

public subroutine sspgv(itype, jobz, uplo, n, ap, bp, w, z, ldz, work, info)

Arguments

Type IntentOptional Attributes Name
integer(kind=ilp), intent(in) :: itype
character(len=1), intent(in) :: jobz
character(len=1), intent(in) :: uplo
integer(kind=ilp), intent(in) :: n
real(kind=sp), intent(inout) :: ap(*)
real(kind=sp), intent(inout) :: bp(*)
real(kind=sp), intent(out) :: w(*)
real(kind=sp), intent(out) :: z(ldz,*)
integer(kind=ilp), intent(in) :: ldz
real(kind=sp), intent(out) :: work(*)
integer(kind=ilp), intent(out) :: info

Module Procedures

public interface stdlib_dspgv()

Arguments

None

public interface stdlib_sspgv()

Arguments

None