Level: Lib Thy Top: 1
Hypotheses:

  1. Alph :

  2. L : L(Alph)

  3. L' : L(Alph)

  4. L = L'

Conclusion:

l.n:. (Ln) l = l.n:. (L'n) l


Applied Tactic: Unfold `lang_eq` 0
Generated subgoals:

1. l:Alph List. (l.n:. (Ln) l) l (l.n:. (L'n) l) l