Unix/Linux Go Back    

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

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

spptri.f(3)				      LAPACK				      spptri.f(3)

       spptri.f -

       subroutine spptri (UPLO, N, AP, INFO)

Function/Subroutine Documentation
   subroutine spptri (characterUPLO, integerN, real, dimension( * )AP, integerINFO)


	    SPPTRI computes the inverse of a real symmetric positive definite
	    matrix A using the Cholesky factorization A = U**T*U or A = L*L**T
	    computed by SPPTRF.


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


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


		     AP is REAL array, dimension (N*(N+1)/2)
		     On entry, the triangular factor U or L from the Cholesky
		     factorization A = U**T*U or A = L*L**T, 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 (symmetric)
		     inverse of A, overwriting the input factor U or L.


		     INFO is 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.

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   November 2011

       Definition at line 94 of file spptri.f.

       Generated automatically by Doxygen for LAPACK from the source code.

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

All times are GMT -4. The time now is 11:53 AM.