Descriptions are provided in [rand.dist]
only for distribution operations
that are not described in [rand.req.dist]
or for operations where there is additional semantic information.
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.
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.