lgamma() [7/7]

template<typename T , require_stan_scalar_or_eigen_t< T > * = nullptr>

auto stan::math::lgamma ( const var_value< T > &  a )

inline

The log gamma function for variables (C99).

The derivative is the digamma function,

\(\frac{d}{dx} \Gamma(x) = \psi^{(0)}(x)\).

Template Parameters

T	Arithmetic or a type inheriting from EigenBase.

Parameters

a	The variable.

Returns

Log gamma of the variable.

Definition at line 24 of file lgamma.hpp.