1 #ifndef STAN_MATH_REV_SCAL_FUN_LMGAMMA_HPP
2 #define STAN_MATH_REV_SCAL_FUN_LMGAMMA_HPP
14 class lmgamma_dv_vari :
public op_dv_vari {
16 lmgamma_dv_vari(
int a, vari* bvi) :
17 op_dv_vari(
stan::math::
lmgamma(a, bvi->val_), a, bvi) {
21 for (
int i = 1; i < ad_ + 1; i++)
23 bvi_->adj_ += adj_ * deriv;
29 return var(
new lmgamma_dv_vari(a, b.
vi_));
Independent (input) and dependent (output) variables for gradients.
vari * vi_
Pointer to the implementation of this variable.
fvar< typename stan::return_type< T, int >::type > lmgamma(int x1, const fvar< T > &x2)
fvar< T > digamma(const fvar< T > &x)