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+.help dvdv Jun99 "Slalib Package"
+.nf
+
+      DOUBLE PRECISION FUNCTION slDVDV (VA, VB)
+
+     - - - - -
+      D V D V
+     - - - - -
+
+  Scalar product of two 3-vectors  (double precision)
+
+  Given:
+      VA      dp(3)     first vector
+      VB      dp(3)     second vector
+
+  The result is the scalar product VA.VB (double precision)
+
+  P.T.Wallace   Starlink   November 1984
+
+  Copyright (C) 1995 Rutherford Appleton Laboratory
+  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
+
+.fi
+.endhelp