Stan Math Library  2.20.0
reverse mode automatic differentiation
trigamma.hpp
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1 #ifndef STAN_MATH_REV_SCAL_FUN_TRIGAMMA_HPP
2 #define STAN_MATH_REV_SCAL_FUN_TRIGAMMA_HPP
3 
4 #include <stan/math/rev/meta.hpp>
5 #include <stan/math/rev/core.hpp>
11 
12 namespace stan {
13 namespace math {
14 
23 inline var trigamma(const var& u) { return trigamma_impl(u); }
24 
25 } // namespace math
26 } // namespace stan
27 #endif
T trigamma_impl(const T &x)
Return the trigamma function applied to the argument.
Definition: trigamma.hpp:33
Independent (input) and dependent (output) variables for gradients.
Definition: var.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

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