Show Password


CentOS 7.0 - man page for chbev (centos section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:
Select Man Page Set:
apropos Keyword Search (sections above)

chbev.f(3)				      LAPACK				       chbev.f(3)

       chbev.f -

       subroutine chbev (JOBZ, UPLO, N, KD, AB, LDAB, W, Z, LDZ, WORK, RWORK, INFO)
	    CHBEV computes the eigenvalues and, optionally, the left and/or right eigenvectors
	   for OTHER matrices

Function/Subroutine Documentation
   subroutine chbev (characterJOBZ, characterUPLO, integerN, integerKD, complex, dimension( ldab,
       * )AB, integerLDAB, real, dimension( * )W, complex, dimension( ldz, * )Z, integerLDZ,
       complex, dimension( * )WORK, real, dimension( * )RWORK, integerINFO)
	CHBEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for
       OTHER matrices


	    CHBEV computes all the eigenvalues and, optionally, eigenvectors of
	    a complex Hermitian band matrix A.


		     JOBZ is CHARACTER*1
		     = 'N':  Compute eigenvalues only;
		     = 'V':  Compute eigenvalues and eigenvectors.


		     UPLO is CHARACTER*1
		     = 'U':  Upper triangle of A is stored;
		     = 'L':  Lower triangle of A is stored.


		     N is INTEGER
		     The order of the matrix A.  N >= 0.


		     KD is INTEGER
		     The number of superdiagonals of the matrix A if UPLO = 'U',
		     or the number of subdiagonals if UPLO = 'L'.  KD >= 0.


		     AB is COMPLEX array, dimension (LDAB, N)
		     On entry, the upper or lower triangle of the Hermitian band
		     matrix A, stored in the first KD+1 rows of the array.  The
		     j-th column of A is stored in the j-th column of the array AB
		     as follows:
		     if UPLO = 'U', AB(kd+1+i-j,j) = A(i,j) for max(1,j-kd)<=i<=j;
		     if UPLO = 'L', AB(1+i-j,j)    = A(i,j) for j<=i<=min(n,j+kd).

		     On exit, AB is overwritten by values generated during the
		     reduction to tridiagonal form.  If UPLO = 'U', the first
		     superdiagonal and the diagonal of the tridiagonal matrix T
		     are returned in rows KD and KD+1 of AB, and if UPLO = 'L',
		     the diagonal and first subdiagonal of T are returned in the
		     first two rows of AB.


		     LDAB is INTEGER
		     The leading dimension of the array AB.  LDAB >= KD + 1.


		     W is REAL array, dimension (N)
		     If INFO = 0, the eigenvalues in ascending order.


		     Z is COMPLEX array, dimension (LDZ, N)
		     If JOBZ = 'V', then if INFO = 0, Z contains the orthonormal
		     eigenvectors of the matrix A, with the i-th column of Z
		     holding the eigenvector associated with W(i).
		     If JOBZ = 'N', then Z is not referenced.


		     LDZ is INTEGER
		     The leading dimension of the array Z.  LDZ >= 1, and if
		     JOBZ = 'V', LDZ >= max(1,N).


		     WORK is COMPLEX array, dimension (N)


		     RWORK is REAL array, dimension (max(1,3*N-2))


		     INFO is INTEGER
		     = 0:  successful exit.
		     < 0:  if INFO = -i, the i-th argument had an illegal value.
		     > 0:  if INFO = i, the algorithm failed to converge; i
			   off-diagonal elements of an intermediate tridiagonal
			   form did not converge to zero.

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   November 2011

       Definition at line 152 of file chbev.f.

       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			       chbev.f(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums

All times are GMT -4. The time now is 10:37 AM.

Unix & Linux Forums Content Copyright©1993-2018. All Rights Reserved.