id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
13254,extreme value distribution's mean/std fail for location=0,anonymous,John Maddock,"Extreme value distribution's mean and standard_deviation use both `detail::check_scale` for location parameter a, which seems wrong, as there's no limitation for location parameter a (besides being finite).

This causes even a standard extreme value distribution to fail:

{{{
BOOST_AUTO_TEST_CASE(checkScaleIssueMean)
{
	boost::math::extreme_value_distribution<> G;

	boost::math::mean(G);
}

BOOST_AUTO_TEST_CASE(checkScaleIssueStd)
{
	boost::math::extreme_value_distribution<> G;

	boost::math::standard_deviation(G);
}
}}}

with

{{{
std::domain_error: Error in function boost::math::mean(const extreme_value_distribution<double>&): Scale parameter is 0, but must be > 0 !

std::domain_error: Error in function boost::math::standard_deviation(const extreme_value_distribution<double>&): Scale parameter is 0, but must be > 0 !
}}}",Bugs,closed,To Be Determined,math,Boost 1.66.0,Problem,obsolete,,