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Simplifying with KroneckerDelta

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  • Subject: [mg101426] Simplifying with KroneckerDelta
  • From: frojasf <fjrojas at>
  • Date: Tue, 7 Jul 2009 05:05:17 -0400 (EDT)


Does anybody know how to tell mathematica to use the KroneckerDelta in order
to simplify expressions? For example, it would be great if it could receive
something like this:

(m+n) KroneckerDelta[k,m+n]  and give

k KroneckerDelta[k,m+n]

Of course this is simple example, but I have an expression which is about
200 terms long, so if it could use the delta to simplify things by itself,
that would be great.

Thanks to all in advance,
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