1DPOTRS(1)                LAPACK routine (version 3.2)                DPOTRS(1)
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NAME

6       DPOTRS  -  solves a system of linear equations A*X = B with a symmetric
7       positive definite matrix A using the Cholesky factorization A =  U**T*U
8       or A = L*L**T computed by DPOTRF
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SYNOPSIS

11       SUBROUTINE DPOTRS( UPLO, N, NRHS, A, LDA, B, LDB, INFO )
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13           CHARACTER      UPLO
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15           INTEGER        INFO, LDA, LDB, N, NRHS
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17           DOUBLE         PRECISION A( LDA, * ), B( LDB, * )
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PURPOSE

20       DPOTRS  solves  a  system  of linear equations A*X = B with a symmetric
21       positive definite matrix A using the Cholesky factorization A =  U**T*U
22       or A = L*L**T computed by DPOTRF.
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ARGUMENTS

25       UPLO    (input) CHARACTER*1
26               = 'U':  Upper triangle of A is stored;
27               = 'L':  Lower triangle of A is stored.
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29       N       (input) INTEGER
30               The order of the matrix A.  N >= 0.
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32       NRHS    (input) INTEGER
33               The  number of right hand sides, i.e., the number of columns of
34               the matrix B.  NRHS >= 0.
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36       A       (input) DOUBLE PRECISION array, dimension (LDA,N)
37               The triangular factor U or L from the Cholesky factorization  A
38               = U**T*U or A = L*L**T, as computed by DPOTRF.
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40       LDA     (input) INTEGER
41               The leading dimension of the array A.  LDA >= max(1,N).
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43       B       (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
44               On  entry, the right hand side matrix B.  On exit, the solution
45               matrix X.
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47       LDB     (input) INTEGER
48               The leading dimension of the array B.  LDB >= max(1,N).
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50       INFO    (output) INTEGER
51               = 0:  successful exit
52               < 0:  if INFO = -i, the i-th argument had an illegal value
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56 LAPACK routine (version 3.2)    November 2008                       DPOTRS(1)
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