At:
list exists exists12111
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.
P(u)
u {x:T| if eq(x,u) true else x(eq) v fi }
By:
AbSetMemEqTypeCD
THEN
AbReduce 0
Generated subgoal:
if eq(u,u)
true
else u(
eq) v fi
Type
x
(
