From Jason Turner

[rand.dist.pois.poisson]

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tmp/tmpsqa2b63g/{from.md → to.md} RENAMED
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  ##### Class template `poisson_distribution` <a id="rand.dist.pois.poisson">[[rand.dist.pois.poisson]]</a>
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  A `poisson_distribution` random number distribution produces integer
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  values i ≥ 0 distributed according to the discrete probability function
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- $$P(i\,|\,\mu) = \frac{e^{-\mu} \mu^{i}}{i\,!} \text{ .}$$ The
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- distribution parameter μ is also known as this distribution’s *mean* .
 
 
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  ``` cpp
 
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  template<class IntType = int>
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- class poisson_distribution
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- {
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  public:
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  // types
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  using result_type = IntType;
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  using param_type = unspecified;
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@@ -42,10 +44,11 @@ template<class IntType = int>
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  operator<<(basic_ostream<charT, traits>& os, const poisson_distribution& x);
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  template<class charT, class traits>
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  friend basic_istream<charT, traits>&
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  operator>>(basic_istream<charT, traits>& is, poisson_distribution& x);
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  };
 
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  ```
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  ``` cpp
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  explicit poisson_distribution(double mean);
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  ```
 
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  ##### Class template `poisson_distribution` <a id="rand.dist.pois.poisson">[[rand.dist.pois.poisson]]</a>
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  A `poisson_distribution` random number distribution produces integer
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  values i ≥ 0 distributed according to the discrete probability function
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+ in .
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+
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+ The distribution parameter μ is also known as this distribution’s
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+ *mean*.
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  ``` cpp
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+ namespace std {
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  template<class IntType = int>
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+ class poisson_distribution {
 
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  public:
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  // types
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  using result_type = IntType;
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  using param_type = unspecified;
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  operator<<(basic_ostream<charT, traits>& os, const poisson_distribution& x);
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  template<class charT, class traits>
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  friend basic_istream<charT, traits>&
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  operator>>(basic_istream<charT, traits>& is, poisson_distribution& x);
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  };
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+ }
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  ```
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  ``` cpp
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  explicit poisson_distribution(double mean);
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  ```