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MathGroup Archive 1999

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Local Variables

  • To: mathgroup at smc.vnet.net
  • Subject: [mg20345] Local Variables
  • From: Eric Spahr <rspahr at worldnet.att.net>
  • Date: Fri, 15 Oct 1999 20:21:00 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

I am most confused... Nested Sums seem to be able to
refer to their
predecessors' iterators as in: 
" Sum[DoSomething, {i, 1, whatever},{j,
j=i+1,someotherwhatever}
     ]"... but:
"For[i = 1, i < whatever, i++,
	For[j = 1, j < someotherwhatever, j++,
	  Do Something[[i]][[j]]
	   ]
   ]" doesn't.
What am I missing?
Thanks in advance.


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