ZTRTTP - Online Linux Manual Page

Section : 1
Updated : November 2008
Source : LAPACK routine (version 3.2)
Note : LAPACK routine (version 3.2)
NAMEZTRTTP - copies a triangular matrix A from full format (TR) to standard packed format (TP)
SYNOPSISSUBROUTINE ZTRTTP(  UPLO, N, A, LDA, AP, INFO )  CHARACTER UPLO  INTEGER INFO, N, LDA  COMPLEX*16 A( LDA, * ), AP( * )
PURPOSEZTRTTP copies a triangular matrix A from full format (TR) to standard packed format (TP).
ARGUMENTSUPLO (input) CHARACTER  = 'U': A is upper triangular;
= 'L': A is lower triangular. N (input) INTEGER  The order of the matrices AP and A. N >= 0. A (input) COMPLEX*16 array, dimension (LDA,N)  On entry, the triangular matrix A. If UPLO = 'U', the leading N-by-N upper triangular part of A contains the upper triangular part of the matrix A, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading N-by-N lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced. LDA (input) INTEGER  The leading dimension of the array A. LDA >= max(1,N). AP (output) COMPLEX*16 array, dimension ( N*(N+1)/2 ),  On exit, the upper or lower triangular matrix A, packed columnwise in a linear array. The j-th column of A is stored in the array AP as follows: if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j; if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n. INFO (output) INTEGER  = 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value 0
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