At: lang auto compute 1 1 2 1 2 1 1
1. Alph: Type
2. L: LangOver(Alph)
3. EquivRel x,y:Alph*. x L-induced Equiv y
4. L 
Alph*
Prop
5. g: (x,y:Alph*//(x L-induced Equiv y))
6. l: Alph*
7. u: Alph
8. v: Alph*
9. (Result(A(g))v) = v x,y:Alph*//(x L-induced Equiv y)
10. u.v = nil
11. ||u.v|| = ||nil|| 
nil = u.v x,y:Alph*//(x L-induced Equiv y)
By: Reduce 11
Generated subgoals:None
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