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#1 2014-02-20 05:11:25

ronn
Guest

Function of Fourier series

If we have the Fourier series

How can we found out what function corresponds to the Fourier series?

#2 2014-02-20 05:34:19

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Function of Fourier series

Hi;

Are all the terms on the right of the sigma in the sum?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#3 2014-02-20 05:47:50

ronn
Guest

Re: Function of Fourier series

Yeah

#4 2014-02-20 05:50:34

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Function of Fourier series

Hi;

That is generally very difficult to do.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5 2014-02-20 06:44:56

ronn
Guest

Re: Function of Fourier series

Another question, how can we calculate the sum of the Fourier series for a given value of t?

#6 2014-02-20 07:08:30

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Function of Fourier series

The sum can in some instances be done by the use of the summation calculus and sometimes through the use of tables or CAS.

Back to the first question, since a Fourier series is generated by integration we might recover the original function by differentiation. Do you know what the period was?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#7 2014-02-20 07:11:45

ronn
Guest

Re: Function of Fourier series

bobbym wrote:

The sum can in some instances be done by the use of the summation calculus and sometimes through the use of tables or CAS.

Back to the first question, since a Fourier series is generated by integration we might recover the original function by differentiation. Do you know what the period was?

Yes, the period is 2*pi.

#8 2014-02-20 12:09:02

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Function of Fourier series

0 to 2π or something else?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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