Automatic Differentiation
 
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erfc.hpp
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1#ifndef STAN_MATH_OPENCL_REV_ERFC_HPP
2#define STAN_MATH_OPENCL_REV_ERFC_HPP
3#ifdef STAN_OPENCL
4
8
9namespace stan {
10namespace math {
11
18template <typename T,
19 require_all_kernel_expressions_and_none_scalar_t<T>* = nullptr>
21 return make_callback_var(
22 erfc(A.val()), [A](vari_value<matrix_cl<double>>& res) mutable {
23 A.adj() -= elt_multiply(
24 res.adj(), elt_multiply(TWO_OVER_SQRT_PI, exp(-square(A.val()))));
25 });
26}
27
28} // namespace math
29} // namespace stan
30
31#endif
32#endif
Represents an arithmetic matrix on the OpenCL device.
Definition matrix_cl.hpp:47
var_value< plain_type_t< T > > make_callback_var(T &&value, F &&functor)
Creates a new var initialized with a callback_vari with a given value and reverse-pass callback funct...
fvar< T > erfc(const fvar< T > &x)
Definition erfc.hpp:15
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...