# Functional theta function

1. Feb 29, 2008

### jarowit

what is the result of fourier transformation of functional theta [Heaviside] function?

2. Feb 29, 2008

### Mentz114

Is it not the case -

$$\int_{-\infty}^\infty}\theta (a)e^{ikx}dx = \int_{a}^{\infty}e^{ikx}dx$$

Last edited: Feb 29, 2008
3. Feb 29, 2008

### jarowit

what you have written is fourier transforamtion of the "usual" theta function.
i would like to know how to transform theta function which in arguments have other function s [i.e. functional theta function].

4. Feb 29, 2008

### Mentz114

True. Did you know there is a math area in the PF ? Just scroll the main page down.

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