Stan Math Library  2.20.0
reverse mode automatic differentiation
trigamma.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_TRIGAMMA_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_TRIGAMMA_HPP
3 
4 #include <stan/math/fwd/meta.hpp>
5 #include <stan/math/fwd/core.hpp>
7 
8 namespace stan {
9 namespace math {
10 
19 template <typename T>
20 inline fvar<T> trigamma(const fvar<T>& u) {
21  return trigamma_impl(u);
22 }
23 
24 } // namespace math
25 } // namespace stan
26 #endif
T trigamma_impl(const T &x)
Return the trigamma function applied to the argument.
Definition: trigamma.hpp:33
fvar< T > trigamma(const fvar< T > &u)
Return the value of the trigamma function at the specified argument (i.e., the second derivative of t...
Definition: trigamma.hpp:20
This template class represents scalars used in forward-mode automatic differentiation, which consist of values and directional derivatives of the specified template type.
Definition: fvar.hpp:41

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