math module bug

[Vlad Dumitrescu XX (LN/EAB)]

> But one question first. What are the functions used for?

They are mostly used in statistics, erf(x) is related to the cumulated normal distribution function, which in turn is the probability to get a value <= x for a random variable with normal distribution.

See http://mathworld.wolfram.com/Erf.html if interested in more details.

> I have alwayws wondered why they were included in Erlang. (Joe?)

My guess is that they are there because they were in the C library, and why leave them out? :-)

regards,
Vlad