1SPOTRS(1)                LAPACK routine (version 3.1)                SPOTRS(1)
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NAME

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

11       SUBROUTINE SPOTRS( 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           REAL           A( LDA, * ), B( LDB, * )
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PURPOSE

20       SPOTRS  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 SPOTRF.
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ARGUMENTS

26       UPLO    (input) CHARACTER*1
27               = 'U':  Upper triangle of A is stored;
28               = 'L':  Lower triangle of A is stored.
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30       N       (input) INTEGER
31               The order of the matrix A.  N >= 0.
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33       NRHS    (input) INTEGER
34               The  number of right hand sides, i.e., the number of columns of
35               the matrix B.  NRHS >= 0.
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37       A       (input) REAL array, dimension (LDA,N)
38               The triangular factor U or L from the Cholesky factorization  A
39               = U**T*U or A = L*L**T, as computed by SPOTRF.
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41       LDA     (input) INTEGER
42               The leading dimension of the array A.  LDA >= max(1,N).
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44       B       (input/output) REAL array, dimension (LDB,NRHS)
45               On  entry, the right hand side matrix B.  On exit, the solution
46               matrix X.
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48       LDB     (input) INTEGER
49               The leading dimension of the array B.  LDB >= max(1,N).
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51       INFO    (output) INTEGER
52               = 0:  successful exit
53               < 0:  if INFO = -i, the i-th argument had an illegal value
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57 LAPACK routine (version 3.1)    November 2006                       SPOTRS(1)
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