MA02ES

Store by skew-symmetry the upper or lower triangle of a skew-symmetric real matrix, given the other triangle

Purpose

  To store by skew-symmetry the upper or lower triangle of a
  skew-symmetric matrix, given the other triangle. The diagonal
  entries are set to zero.

      SUBROUTINE MA02ES( UPLO, N, A, LDA )
C     .. Scalar Arguments ..
      CHARACTER          UPLO
      INTEGER            LDA, N
C     .. Array Arguments ..
      DOUBLE PRECISION   A(LDA,*)

Mode Parameters

  UPLO    CHARACTER*1
          Specifies which part of the matrix is given as follows:
          = 'U':  Upper triangular part;
          = 'L':  Lower triangular part.
          For all other values, the array A is not referenced.

  N       (input) INTEGER
          The order of the matrix A.  N >= 0.

  A       (input/output) DOUBLE PRECISION array, dimension (LDA,N)
          On entry, the leading N-by-N upper triangular part
          (if UPLO = 'U'), or lower triangular part (if UPLO = 'L'),
          of this array must contain the corresponding upper or
          lower triangle of the skew-symmetric matrix A.
          On exit, the leading N-by-N part of this array contains
          the skew-symmetric matrix A with all elements stored.

  LDA     INTEGER
          The leading dimension of the array A.  LDA >= max(1,N).

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Program Text

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