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At: lang closure functionality


Alph:Type, L,L':LangOver(Alph). L = L' (L) = (L')

By:
Unfold `lang_closure` 0
THEN
UnivCD


Generated subgoal:

11. Alph: Type
2. L: LangOver(Alph)
3. L': LangOver(Alph)
4. L = L'
l.n:. (Ln)(l) = l.n:. (L'n)(l)


About:
alluniverseimplieslambdaexistsapply