Thank you for that tip. I think convolution is the operation a was

looking for where:

$\displaystyle f(x) = g(x)$ for the first step and

$\displaystyle f(x) = f(x) * g(x)$ for the second step and so on

If I am right that should result in a probability density function

that has again an area of 1 below?!

Especially this page illustrated well what I was looking for (1 D application)

Spatial convolution
Anyway, I have to try now to use that function in pyhton/scipy to

get a resulting plot I can further examine. If anyone is familiar with

that, it'd be great help to me...

Best regards,

johannes

PS: Is that the correct subforum? Otherwise it should be moved...