zchex
zchex - (obsolete) compute the Cholesky decomposition of a symmetric positive definite
matrix A.
SUBROUTINE ZCHEX( A, LDA, N, K, L, Z, LDZ, NZ, COS, SIN, JOB)
DOUBLE COMPLEX A(LDA,*), Z(LDZ,*), SIN(*)
INTEGER LDA, N, K, L, LDZ, NZ, JOB
DOUBLE PRECISION COS(*)
SUBROUTINE ZCHEX_64( A, LDA, N, K, L, Z, LDZ, NZ, COS, SIN, JOB)
DOUBLE COMPLEX A(LDA,*), Z(LDZ,*), SIN(*)
INTEGER*8 LDA, N, K, L, LDZ, NZ, JOB
DOUBLE PRECISION COS(*)
#include <sunperf.h>
void zchex(doublecomplex *a, int lda, int n, int k, int l, doublecomplex *z, int ldz, int nz, double *cos, doublecomplex *sin, int job);
void zchex_64(doublecomplex *a, long lda, long n, long k, long l, doublecomplex *z, long ldz, long nz, double *cos, doublecomplex *sin, long job);
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* A (input/output)
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On entry, the upper triangle of the matrix A. On exit, the upper triangle of A contains the upper triangle of the updated factor. The strict lower triangle of A is not referenced.
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* LDA (input)
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Leading dimension of the array A as specified in a dimension or type statement. LDA >= max(1,N).
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* N (input)
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Order of the matrix A. N >= 0.
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* K (input)
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First column to be permuted. 1 <= K <= L.
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* L (input)
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Last column to be permuted; must be strictly greater than K. K <= L <= N.
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* Z (input/output)
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Array of vectors into which the transformation U is multiplied. Not used if NZ = 0.
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* LDZ (input)
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Leading dimension of the array Z as specified in a dimension or type statement. LDZ >= max(1,N).
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* NZ (input)
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Number of columns in the matrix Z. NZ >= 0.
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* COS (input)
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Cosines of the transforming rotations.
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* SIN (output)
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Sines of the transforming rotations.
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* JOB (input)
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Determines the type of permutation:
1 right circular shift
2 left circular shift