Erf - error functio
x Erf -> result
0.5 erf -> 0.5205
Computes the error function
erf(x) = 2/sqrt(pi) int_0^x dt exp(-t^2)
x (double): error function argument
Requires the GSL.
http://sources.redhat.com/gsl/ref
H E Plesser
2001-07-30
/builddir/build/BUILD/nest-simulator-3.3/nest-simulator-3.3/sli/specialfunctionsmodule.h