Valhalla Legends Forums Archive | Yoni's Math Forum | Fourier Series

AuthorMessageTime
idoL
Yoni, have you ever delved into this advanced math subject? If so, that's great because I am advanced in math and need some help on intergals.
Can you help me figure out the propertie of this intergal, it's set in a decimal frame.

a(0) / 2 + (sum)(k=1..inf) (a(k) cos kx + b(k) sin kx)

a(k) = 1/PI (integral)(-PI to PI) f(x) cos kx dx
b(k) = 1/PI (integral)(-PI to PI) f(x) sin kx dx




July 12, 2004, 2:41 PM
Yoni
I'm going to learn this sometime during August.
Either wait until then, or Adron will help you now if he remembers this subject.
July 12, 2004, 8:50 PM
Adron
In a decimal frame? What do you want to know about the integral? Just calculate it?
July 12, 2004, 10:10 PM
Raven
http://mathworld.wolfram.com/FourierSeries.html

I checked a Calc book, and it essentially lists what you typed as the definition for the Fourier Series. What did you mean by property? Perhaps you were you referring to the interval of integration or convergence?
July 13, 2004, 1:38 AM
idoL
[quote author=Raven link=board=36;threadid=7675;start=0#msg70087 date=1089682699]
http://mathworld.wolfram.com/FourierSeries.html

I checked a Calc book, and it essentially lists what you typed as the definition for the Fourier Series. What did you mean by property? Perhaps you were you referring to the interval of integration or convergence?
[/quote]

Yeah that's it, sorry!
July 13, 2004, 2:01 AM
Adron
What about f(x) ?
July 13, 2004, 2:02 PM
idoL
[quote author=Adron link=board=36;threadid=7675;start=0#msg70164 date=1089727326]
What about f(x) ?
[/quote]

What about it?
Doesn't the interval count for the f(x) if it's displayed in context?
(I'm a newb :-\)
July 13, 2004, 6:00 PM
Adron
Well, the subject says all you need to know about those equations?

You can't analyze convergence of a fourier series if f(x) is completely unknown. Generally, if f(x) is periodic, it will converge.
July 13, 2004, 9:00 PM

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