UnivSourceuniv_level_mem l u Is l is mentioned in u ?
univ_level_rem u v min removes u from v, resulting in min if v was exactly u.
A value with universe Constraints.t.
Constrained
Enforcing Constraints.t.
Universe contexts (as sets)
A set of universes with universe Constraints.t. We linearize the set to a list after typechecking. Beware, representation could change.
A value in a universe context set.
Substitution of universes.