MathGroup Archive 2004

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Tr vs Total

  • To: mathgroup at
  • Subject: [mg49346] Tr vs Total
  • From: Daniel Reeves <dreeves at>
  • Date: Thu, 15 Jul 2004 07:00:09 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Tr seems to have a problem with big lists.  Anyone know why the following 
2 expressions don't yield the same result?

Tr[Table[8000000, {269}]]

Total[Table[8000000, {269}]]

(they do if you make either of those constants smaller)

--  - -  google://"Daniel Reeves"

"...Why not save a step and decide that the origin of the universe 
is an unanswerable question?  Or, if we say that God has always 
existed, why not save a step and conclude that the universe has 
always existed?"
  -- Carl Sagan, Cosmos

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