DFT/QFT help [Archive] - Physics Forums

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Baggio

Dec16-04, 05:44 AM

Please see the attachment

Can anyone tell me why the bracketed term = 0 if c does not equal and integer multiple of q/r ...

Thanks :(

Norman

Dec16-04, 03:04 PM

Think of it as an integral over a sine or cosine function. If it is not an integral number of periods, then the integral(sum) averages to zero.

marlon

Dec19-04, 08:34 AM

Hi,

can you provide some more indept info ??? Were there any boundary-conditions given ???

I can't really find any solution to your problem based upon these data???

Can you post the entire display of this formula and how it is constructed???

regards
marlon