Stan Math Library  2.11.0
reverse mode automatic differentiation
log1p.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_LOG1P_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_LOG1P_HPP
3 
4 #include <stan/math/fwd/core.hpp>
5 
8 
9 namespace stan {
10 
11  namespace math {
12 
13  template <typename T>
14  inline
15  fvar<T>
16  log1p(const fvar<T>& x) {
17  using stan::math::log1p;
19  if (x.val_ < -1.0)
21  else
22  return fvar<T>(log1p(x.val_), x.d_ / (1 + x.val_));
23  }
24  }
25 }
26 #endif
const double NOT_A_NUMBER
(Quiet) not-a-number value.
Definition: constants.hpp:56
fvar< T > log1p(const fvar< T > &x)
Definition: log1p.hpp:16

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