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April 20th, 2014, 10:55 PM   #1
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Spatial and temporal periods and periodic functions

A periodic function is one that , by definition. However, the argument can be function of space and time ( ), so exist 2 lines of development, one spatial and other temporal:

or the both together:

so, becomes obvius that is the analogus of , thus the correct wound't be say that a periodic function is one that ?
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April 21st, 2014, 09:09 AM   #2
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I suspect that your confusion arises because the notation $nT$ suggests time. In reality a periodic function is one that repeats regularly repeats its values as the free parameter increases, whatever that parameter represents.
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