The degenerate convex set \(\{\theta\}\), e.g. the null for
which a likelihood ratio \(Q / P_\theta\) is an e-variable.
It is the 0-simplex; certify() handles it by direct evaluation.
Value
A point_region, which is also a simplex_region().
Examples
point_region(theta = c(0.5, 0.3, 0.2))
#> <point_region>
#> the point (0.5, 0.3, 0.2)
#> facets: 3 equalities