1#ifndef STAN_MATH_REV_FUN_ABS_HPP
2#define STAN_MATH_REV_FUN_ABS_HPP
V complex_abs(const std::complex< V > &z)
Return the absolute value of the complex argument.
fvar< T > abs(const fvar< T > &x)
fvar< T > fabs(const fvar< T > &x)
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...