Re: finding Fourier Series.
- To: mathgroup at smc.vnet.net
- Subject: [mg63852] Re: finding Fourier Series.
- From: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>
- Date: Thu, 19 Jan 2006 00:02:51 -0500 (EST)
- References: <dqks93$ptf$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Use FourierTransform: FourierTransform[a^n*UnitStep[n],n,k] to obtain I/(Sqrt[2*Pi]*(k - I*Log[a])) Steve Luttrell "bd satish" <bdsatish at gmail.com> wrote in message news:dqks93$ptf$1 at smc.vnet.net... > > Hi buddies, > > Which command (in MATHEMATICA) should I use to evaluate the > so-called Discrete-Time Fourier Series ? > > Another bug: --- > > > The command FOURIER[ { list } ] finds the FFT (Fast Fourier > Transform) of a list. How can I evaluate FFT symbolically (instead of a > numerical list ) ? > > Specifically , > > find the FFT of a^n * UnitStep[n] , n belongs to integer > and Abs[a] < 1 > >