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cosh.hpp
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1 #ifndef STAN_MATH_REV_SCAL_FUN_COSH_HPP
2 #define STAN_MATH_REV_SCAL_FUN_COSH_HPP
3
4 #include <stan/math/rev/core.hpp>
5 #include <cmath>
6 #include <valarray>
7
8 namespace stan {
9 namespace math {
10
11 namespace {
12 class cosh_vari : public op_v_vari {
13 public:
14 explicit cosh_vari(vari* avi) :
15 op_v_vari(std::cosh(avi->val_), avi) {
16 }
17 void chain() {
18 avi_->adj_ += adj_ * std::sinh(avi_->val_);
19 }
20 };
21 }
22
50 inline var cosh(const var& a) {
51 return var(new cosh_vari(a.vi_));
52 }
53
54 }
55 }
56 #endif
core.hpp
stan::math::cosh
fvar< T > cosh(const fvar< T > &x)
Definition: cosh.hpp:13
stan
Definition: log_sum_exp.hpp:8
std
Definition: std_numeric_limits.hpp:7
stan::math::var
Independent (input) and dependent (output) variables for gradients.
Definition: var.hpp:31
stan::math::var::vi_
vari * vi_
Pointer to the implementation of this variable.
Definition: var.hpp:43
stan::math::sinh
fvar< T > sinh(const fvar< T > &x)
Definition: sinh.hpp:14

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