cpptri man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

CPPTRI(l)			       )			     CPPTRI(l)

NAME
       CPPTRI  -  compute the inverse of a complex Hermitian positive definite
       matrix A using the Cholesky factorization A = U**H*U or A = L*L**H com‐
       puted by CPPTRF

SYNOPSIS
       SUBROUTINE CPPTRI( UPLO, N, AP, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, N

	   COMPLEX	  AP( * )

PURPOSE
       CPPTRI  computes	 the  inverse of a complex Hermitian positive definite
       matrix A using the Cholesky factorization A = U**H*U or A = L*L**H com‐
       puted by CPPTRF.

ARGUMENTS
       UPLO    (input) CHARACTER*1
	       = 'U':  Upper triangular factor is stored in AP;
	       = 'L':  Lower triangular factor is stored in AP.

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.

       AP      (input/output) COMPLEX array, dimension (N*(N+1)/2)
	       On  entry,  the triangular factor U or L from the Cholesky fac‐
	       torization A = U**H*U or A = L*L**H,  packed  columnwise	 as  a
	       linear array.  The j-th column of U or L is stored in the array
	       AP as follows: if UPLO = 'U', AP(i + (j-1)*j/2)	=  U(i,j)  for
	       1<=i<=j;	 if  UPLO  =  'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for
	       j<=i<=n.

	       On exit, the upper or lower triangle of the (Hermitian) inverse
	       of A, overwriting the input factor U or L.

       INFO    (output) INTEGER
	       = 0:  successful exit
	       < 0:  if INFO = -i, the i-th argument had an illegal value
	       >  0:   if  INFO = i, the (i,i) element of the factor U or L is
	       zero, and the inverse could not be computed.

LAPACK version 3.0		 15 June 2000			     CPPTRI(l)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net