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Topic: Re: Exchanging the order of summation
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drobotv@gmail.com

Posts: 14
Registered: 5/21/07
Re: Exchanging the order of summation
Posted: Nov 10, 2011 6:04 PM
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Resent-From: <bergv@illinois.edu>
From: Vladimir Drobot <drobotv@gmail.com>
Date: November 10, 2011 12:50:08 PM MST
To: "sci-math-research@moderators.isc.org"
<sci-math-research@moderators.isc.org>
Subject: Re: Exchanging the order of summation
Reply-To: "sci.math.research@googlegroups.com"
<sci.math.research@googlegroups.com>

It is really quite a trivial observation, but if, in your notation,
f(n, q) is non-negative, then you can interchange the limits anyway you
want.
So you don't need the condition that K is finite in this case.

As ever,


Vlad


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