1#ifndef STAN_MATH_FWD_FUN_ARG_HPP
2#define STAN_MATH_FWD_FUN_ARG_HPP
V complex_arg(const std::complex< V > &z)
Return the phase angle of the complex argument.
fvar< T > arg(const std::complex< fvar< T > > &z)
Return the phase angle of the complex argument.
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...
This template class represents scalars used in forward-mode automatic differentiation,...