Stan Math Library  2.12.0
reverse mode automatic differentiation
digamma.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_DIGAMMA_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_DIGAMMA_HPP
3 
4 #include <stan/math/fwd/core.hpp>
5 
8 
9 namespace stan {
10  namespace math {
11 
12  template <typename T>
13  inline
14  fvar<T>
15  digamma(const fvar<T>& x) {
16  return fvar<T>(digamma(x.val_), x.d_ * trigamma(x.val_));
17  }
18  }
19 }
20 #endif
T trigamma(T x)
Definition: trigamma.hpp:49
fvar< T > digamma(const fvar< T > &x)
Definition: digamma.hpp:15

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