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April 29th, 2012, 01:27 PM   #1
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Calculation of sum

Help me please to calculate/approximate the following sum:

for any
Thank you in advance.
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April 29th, 2012, 01:44 PM   #2
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Re: Calculation of sum

Does n = l? In that case for odd q's the answer is 0.
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April 29th, 2012, 05:12 PM   #3
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Re: Calculation of sum

Yes, you are right. . But what about even . And ?
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April 30th, 2012, 02:09 PM   #4
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Re: Calculation of sum

Quote:
Originally Posted by Anton29
Yes, you are right. . But what about even . And ?
Sorry - can't help. I don't believe there is any closed form expression.
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