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y = erf(x)
\[
{\rm erf} (x) = \frac{2}{ \sqrt{\pi} } \int_0^x \exp( - t * t ) \; {\bf d} t
\]
erf for arguments of type
float and double
is included in the CppAD namespace
(the corresponding results has the same type as the arguments).
The type Base can be any type in the
AD levels above
above float or double.
const AD<Base> &x
const VecAD<Base>::reference &x
AD<Base> y