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Controlling function arguments

  • To: mathgroup at
  • Subject: [mg48817] Controlling function arguments
  • From: Virgil Stokes <Virgil.Stokes at>
  • Date: Thu, 17 Jun 2004 04:07:39 -0400 (EDT)
  • Organization: Systems & Control
  • Sender: owner-wri-mathgroup at

I found the following Mathematica code:

  NumberVectorQ[x_] := VectorQ[x] && And @@ NumberQ /@ x;
  functionx[k_Integer?Positive, v_?NumberVectorQ, w_?NumberVectorQ, 
q_?NumberVectorQ] := .....

where, I have left out the body of this function (functionx). What does 
the first line actually accomplish?

--V. Stokes

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