Stan Math Library  2.12.0
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  namespace math {
11 
12  template <typename T>
13  inline
14  fvar<T>
15  log1p(const fvar<T>& x) {
16  if (x.val_ < -1.0)
18  else
19  return fvar<T>(log1p(x.val_), x.d_ / (1 + x.val_));
20  }
21  }
22 }
23 #endif
const double NOT_A_NUMBER
(Quiet) not-a-number value.
Definition: constants.hpp:55
fvar< T > log1p(const fvar< T > &x)
Definition: log1p.hpp:15

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