At:
not list all 2 implies exists not121111211111
1.
T: Type
2.
eq: {T}
3.
P: T
4.
L: T List
5.
u: T
6.
v: T List
7.
xv.P(x) (x:{x:T| x(eq) v }. P(x))
8.
(P(u) & xv.P(x))
9.
(P(u) & xv.P(x)) P(u) xv.P(x)
10.
xv.P(x)
11.
x: T
12.
x(eq) v
13.
P(x)
if eq(x,u) true else x(eq) v fi
By:
IfThenElseCases 0
Generated subgoal:
true
x
(
x:{x:T| x(
true
