.help imxv Jun99 "Slalib Package"
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      SUBROUTINE slIMXV (RM, VA, VB)

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      I M X V
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  Performs the 3-D backward unitary transformation:

     vector VB = (inverse of matrix RM) * vector VA

  (single precision)

  (n.b.  the matrix must be unitary, as this routine assumes that
   the inverse and transpose are identical)

  Given:
     RM       real(3,3)    matrix
     VA       real(3)      vector

  Returned:
     VB       real(3)      result vector

  P.T.Wallace   Starlink   November 1984

  Copyright (C) 1995 Rutherford Appleton Laboratory
  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.

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