Stan Math Library  2.15.0
reverse mode automatic differentiation
trigamma.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_TRIGAMMA_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_TRIGAMMA_HPP
3 
6 
7 namespace stan {
8  namespace math {
9 
13  struct trigamma_fun {
22  template <typename T>
23  static inline T fun(const T& x) {
24  return trigamma(x);
25  }
26  };
27 
38  template <typename T>
40  trigamma(const T& x) {
42  }
43 
44  }
45 }
46 
47 #endif
static T fun(const T &x)
Return the approximate value of the Phi() function applied to the argument.
Definition: trigamma.hpp:23
Eigen::Matrix< scalar_t, T::RowsAtCompileTime, T::ColsAtCompileTime > return_t
Return type for applying the function elementwise to a matrix expression template of type T...
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:21
static return_t apply(const T &x)
Return the result of applying the function defined by the template parameter F to the specified matri...
Structure to wrap trigamma() so it can be vectorized.
Definition: trigamma.hpp:13

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