- #1

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I have a a Fourier transformed variable [itex]\hat{\eta}(k)[/itex] defined as the following:

[tex]

\hat{\eta}(k)=\frac{e^{-k^{2}}\tanh k}{kU^{2}+(-B+\Omega U+E_{b}|k|-k^{2})\tanh k}

[/tex]

The parameters [itex]U,B,\Omega,E_{b}[/itex] have all been defined previously. I have naively tried the following:

[tex]

\eta :=\textrm{invfourier}(ETA,k,x)

[/tex]

This doesn't work. What am I doing wrong?

Cheers