At:
list exists exists1212112
1.
T: Type
2.
eq: {T=}
3.
P: TType
4.
L: T List
5.
u: T
6.
v: T List
7.
xv.P(x) (x:{x:T| x(eq) v }. P(x))
8.
xv.P(x) (x:{x:T| x(eq) v }. P(x))
9.
xv.P(x)
10.
x: {x:T| x(eq) v }
11.
P(x)
if eq(x,u) true else x(eq) v fi
By:
IfThenElseCases 0
Generated subgoals:
true
eq) v
Type
x
(
true
