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inv.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_INV_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_INV_HPP
3
4 #include <stan/math/fwd/core.hpp>
5
6 #include <stan/math/prim/scal/fun/square.hpp>
7
8 namespace stan {
9 namespace math {
10
11 template <typename T>
12 inline
13 fvar<T>
14 inv(const fvar<T>& x) {
15 return fvar<T>(1 / x.val_, -x.d_ / square(x.val_));
16 }
17 }
18 }
19 #endif
core.hpp
stan::math::fvar::d_
T d_
Definition: fvar.hpp:14
stan
Definition: log_sum_exp.hpp:8
square.hpp
stan::math::square
fvar< T > square(const fvar< T > &x)
Definition: square.hpp:14
stan::math::fvar::val_
T val_
Definition: fvar.hpp:13
stan::math::fvar
Definition: fvar.hpp:12
stan::math::inv
fvar< T > inv(const fvar< T > &x)
Definition: inv.hpp:14

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