[rand.dist.general]

# 29 Numerics library [[numerics]](./#numerics)

## 29.5 Random number generation [[rand]](rand#dist.general)

### 29.5.9 Random number distribution class templates [[rand.dist]](rand.dist#general)

#### 29.5.9.1 General [rand.dist.general]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L4486)

Each type instantiated
from a class template specified in [[rand.dist]](rand.dist "29.5.9 Random number distribution class templates") meets the requirements
of a [random number distribution](rand.req.dist "29.5.3.6 Random number distribution requirements [rand.req.dist]") type[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L4492)

Descriptions are provided in [[rand.dist]](rand.dist "29.5.9 Random number distribution class templates") only for distribution operations
that are not described in [[rand.req.dist]](rand.req.dist "29.5.3.6 Random number distribution requirements") or for operations where there is additional semantic information[.](#2.sentence-1)

In particular,
declarations for copy constructors,
for copy assignment operators,
for streaming operators,
and for equality and inequality operators
are not shown in the synopses[.](#2.sentence-2)

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L4504)

The algorithms for producing each
of the specified distributions areimplementation-defined[.](#3.sentence-1)

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L4509)

The value of each probability density function p(z) and of each discrete probability function P(zi) specified in this subclause
is 0 everywhere outside its stated domain[.](#4.sentence-1)