Void in Maxima

Thanks, this is close to what I had in mind.

Rich

  ----- Original Message ----- 
  From: Luigi Marino 
  To: maxima at math.utexas.edu 
  Sent: Monday, October 05, 2009 4:04 AM
  Subject: Void in Maxima


  Rich
  look at my sample:

  f(x):= block(
  if x > 0 
  then return ([])
  else 
   -1);
  f(9);
  []
  f(-9);
  -1
  f(9)*9;
  []

  Best
  Luigi


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