D4a7. Eigenvalues and eigenvectors

Functions
Sub	Dgsev (Jobz As String, N As Long, Val() As Double, Ptr() As Long, Ind() As Long, Which As String, Nev As Long, Ncv As Long, Dr() As Double, Di() As Double, Z() As Double, Optional Info As Long, Optional Nconv As Long, Optional Niter As Long, Optional Base As Long=-1, Optional Format As Long=0, Optional Mode As Long=1, Optional Sigmar As Double=0, Optional Sigmai As Double=0, Optional Maxiter As Long=300, Optional Tol As Double=0)
	Eigenvalues and eigenvectors of a general sparse matrix (implicitly restarted Arnoldi method (IRAM)) (Arpack) (driver)
Sub	Dgsgv (Jobz As String, Uplo2 As String, N As Long, Val() As Double, Ptr() As Long, Ind() As Long, Val2() As Double, Ptr2() As Long, Ind2() As Long, Which As String, Nev As Long, Ncv As Long, Dr() As Double, Di() As Double, Z() As Double, Optional Info As Long, Optional Nconv As Long, Optional Niter As Long, Optional Base As Long=-1, Optional Base2 As Long=-1, Optional Format As Long=0, Optional Mode As Long=2, Optional Sigmar As Double=0, Optional Sigmai As Double=0, Optional Maxiter As Long=300, Optional Tol As Double=0)
	Generalized eigenvalue problem of a general sparse matrix (implicitly restarted Arnoldi method (IRAM)) (Arpack) (driver)
Sub	Dnaupd (Ido As Long, Bmat As String, N As Long, Which As String, Nev As Long, Resid() As Double, Ncv As Long, V() As Double, IParam() As Long, Ipntr() As Long, Workd() As Double, Workl() As Double, Info As Long, Optional Tol As Double=0)
	Arnoldi factorization of a general sparse matrix (Arpack)
Sub	Dneupd (Rvec As Long, Howmny As String, Selct() As Long, Dr() As Double, Di() As Double, Z() As Double, Sigmar As Double, Sigmai As Double, Workev() As Double, Bmat As String, N As Long, ByVal Which As String, Nev As Long, Resid() As Double, Ncv As Long, V() As Double, IParam() As Long, Ipntr() As Long, Workd() As Double, Workl() As Double, Info As Long, Optional Tol As Double=0)
	Approximate eigenvalues and eigenvectors of a general sparse matrix from Arnoldi factorization (Arpack)
Sub	Dsaupd (Ido As Long, Bmat As String, N As Long, Which As String, Nev As Long, Resid() As Double, Ncv As Long, V() As Double, IParam() As Long, Ipntr() As Long, Workd() As Double, Workl() As Double, Info As Long, Optional Tol As Double=0)
	Lanczos factorization of a symmetric sparse matrix (Arpack)
Sub	Dseupd (Rvec As Long, Howmny As String, Selct() As Long, D() As Double, Z() As Double, Sigma As Double, Bmat As String, N As Long, ByVal Which As String, Nev As Long, Resid() As Double, Ncv As Long, V() As Double, IParam() As Long, Ipntr() As Long, Workd() As Double, Workl() As Double, Info As Long, Optional Tol As Double=0)
	Approximate eigenvalues and eigenvectors of a symmetric sparse matrix from Lanczos factorization (Arpack)
Sub	Dssev (Jobz As String, Uplo As String, N As Long, Val() As Double, Ptr() As Long, Ind() As Long, Which As String, Nev As Long, Ncv As Long, D() As Double, Z() As Double, Optional Info As Long, Optional Nconv As Long, Optional Niter As Long, Optional Base As Long=-1, Optional Format As Long=0, Optional Mode As Long=1, Optional Sigma As Double=0, Optional Maxiter As Long=300, Optional Tol As Double=0)
	Eigenvalues and eigenvectors of a symmetric sparse matrix (implicitly restarted Lanczos method (IRLM)) (Arpack) (driver)
Sub	Dssgv (Jobz As String, Uplo As String, Uplo2 As String, N As Long, Val() As Double, Ptr() As Long, Ind() As Long, Val2() As Double, Ptr2() As Long, Ind2() As Long, Which As String, Nev As Long, Ncv As Long, D() As Double, Z() As Double, Optional Info As Long, Optional Nconv As Long, Optional Niter As Long, Optional Base As Long=-1, Optional Base2 As Long=-1, Optional Format As Long=0, Optional Mode As Long=2, Optional Sigma As Double=0, Optional Maxiter As Long=300, Optional Tol As Double=0)
	Generalized eigenvalue problem of a symmetric sparse matrix (implicitly restarted Lanczos method (IRLM)) (Arpack) (driver)

Detailed Description

This is the group of D4a7. Eigenvalues and eigenvectors