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reverse mode automatic differentiation
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stan
math
prim
scal
fun
inv_sqrt.hpp
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#ifndef STAN_MATH_PRIM_SCAL_FUN_INV_SQRT_HPP
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#define STAN_MATH_PRIM_SCAL_FUN_INV_SQRT_HPP
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#include <boost/math/tools/promotion.hpp>
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namespace
stan
{
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namespace
math {
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template
<
typename
T>
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inline
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typename
boost::math::tools::promote_args<T>::type
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inv_sqrt
(
const
T x) {
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using
std::sqrt
;
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return
1.0 /
sqrt
(x);
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}
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}
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}
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#endif
stan::math::inv_sqrt
fvar< T > inv_sqrt(const fvar< T > &x)
Definition:
inv_sqrt.hpp:15
stan::math::sqrt
fvar< T > sqrt(const fvar< T > &x)
Definition:
sqrt.hpp:15
stan
Definition:
log_sum_exp.hpp:8
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