D4a1. Ordinary eigenvalue problems (symmetric matrices) - Computational routines

Functions
Sub	Ddisna (Job As String, M As Long, N As Long, D() As Double, Sep() As Double, Info As Long)
	Condition numbers for the eigenvectors of a real symmetric or complex Hermitian matrix, or for the singular vectors of a general matrix
Sub	Dopgtr (Uplo As String, N As Long, Ap() As Double, Tau() As Double, Q() As Double, Info As Long)
	Generates a transform matrix from a real symmetric matrix in packed form to tridiagonal form
Sub	Dopmtr (Side As String, Uplo As String, Trans As String, M As Long, N As Long, Ap() As Double, Tau() As Double, C() As Double, Info As Long)
	Multiplies by a transform matrix from a real symmetric matrix in packed form to tridiagonal form
Sub	Dorgtr (Uplo As String, N As Long, A() As Double, Tau() As Double, Info As Long)
	Generates a transform matrix from a real symmetric matrix to tridiagonal form
Sub	Dormtr (Side As String, Uplo As String, Trans As String, M As Long, N As Long, A() As Double, Tau() As Double, C() As Double, Info As Long)
	Multiplies by a transform matrix from a real symmetric matrix to tridiagonal form
Sub	Dpteqr (Compz As String, N As Long, D() As Double, E() As Double, Z() As Double, Info As Long)
	Eigenvalues and eigenvectors of a symmetric positive definite tridiagonal matrix
Sub	Dsbtrd (Vect As String, Uplo As String, N As Long, Kd As Long, Ab() As Double, D() As Double, E() As Double, Q() As Double, Info As Long)
	Reduces a real symmetric band matrix to tridiagonal form
Sub	Dsptrd (Uplo As String, N As Long, Ap() As Double, D() As Double, E() As Double, Tau() As Double, Info As Long)
	Reduces a real symmetric matrix stored in packed form to tridiagonal form
Sub	Dstebz (Range As String, Order As String, N As Long, Vl As Double, Vu As Double, Il As Long, Iu As Long, AbsTol As Double, D() As Double, E() As Double, M As Long, Nsplit As Long, W() As Double, Iblock() As Long, Isplit() As Long, Info As Long)
	Eigenvalues of a symmetric tridiagonal matrix (Bisection method)
Sub	Dstedc (Compz As String, N As Long, D() As Double, E() As Double, Z() As Double, Info As Long)
	Eigenvalues and eigenvectors of a symmetric tridiagonal matrix (Divide and conquer method)
Sub	Dstein (N As Long, D() As Double, E() As Double, M As Long, W() As Double, Iblock() As Long, Isplit() As Long, Z() As Double, Ifail() As Long, Info As Long)
	Eigenvectors of a symmetric tridiagonal matrix (Inverse iteration method)
Sub	Dstemr (Jobz As String, Range As String, N As Long, D() As Double, E() As Double, Vl As Double, Vu As Double, Il As Long, Iu As Long, M As Long, W() As Double, Z() As Double, Nzc As Long, Isuppz() As Long, Tryrac As Boolean, Info As Long)
	Eigenvalues and eigenvectors of a symmetric tridiagonal matrix (MRRR method)
Sub	Dsteqr (Compz As String, N As Long, D() As Double, E() As Double, Z() As Double, Info As Long)
	Eigenvalues and eigenvectors of a symmetric tridiagonal matrix (QL or QR method)
Sub	Dsterf (N As Long, D() As Double, E() As Double, Info As Long)
	Eigenvalues of a symmetric tridiagonal matrix (QL or QR method)
Sub	Dsytrd (Uplo As String, N As Long, A() As Double, D() As Double, E() As Double, Tau() As Double, Info As Long)
	Reduces a real symmetric matrix to tridiagonal form

Detailed Description

This is the group of D4a1. Ordinary eigenvalue problems (symmetric matrices) - Computational routines.