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August 17th, 2007, 08:59 PM  #1 
Senior Member Joined: Apr 2007 Posts: 2,140 Thanks: 0  Sigma Notations
Please help: 1. What does ∑ m mean? (m part is supposed to be on the bottom part of the sigma notation). 2. What does ∑ i,j mean? (i,j part is supposed to be on the bottom part of the sigma notation). 3. What does ∑ i,j,k mean? (i,j,k part is supposed to be on the bottom part of the sigma notation). 4. If I am missing any other important sigma stuff, please let me know. Thanks, J. 
August 18th, 2007, 03:37 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,308 Thanks: 1977 
See this article.


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