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Folks interested in this, but finding it too long, so waiting for someone to summarize/explain maybe :)

There are a lot of engineers here who would have ended up in finance (possibly as quants), myself included. This sort of thing is right up our street.

Especially since the result is not new (it was written in 2004). Even though the topic is within my interests I'm confused that this is on the front page of HN.

I guess it's interesting to see an alternative to Black Scholes. Fourier transform (FFT) is a common topic in advanced algos.