Level: Lib Thy Top:
Hypotheses:None
Conclusion:
Alph:
. L,M,N:L(Alph). (L U (M 
N)) = ((L U M) (L U N))
Applied Tactic: Unfold `languages` 0 THEN
Unfold `lang_eq` 0 THEN
Unfold `lang_union` 0 THEN
Unfold `lang_inters` 0 THEN
UnivCD THENW Auto
Generated subgoals:1. (
l.L l 
(l.M l 
N l) l) l 
(l.(l.L l M l) l (l.L l N l) l) l