At:
not disjoint is member lemma1111121
1.
T: Type
2.
eq: {T=}
3.
eq TT
4.
x,y:T. eq(x,y) x = y
5.
L: T List
6.
M: T List
7.
u: T
8.
v: T List
9.
True (x:T. False & x(eq) v)
10.
True
x:T. False & if eq(x,u) true else x(eq) v fi
By:
Analyze -2
Generated subgoal: