Conclusion
-1.
FORALL
A:finite
set[T]
:
subset?({i:T
|
vert(G!1)(i)
AND
V!1(i)},
A)
IMPLIES
is
finite({i:T
|
vert(G!1)(i)
AND
V!1(i)})
1.
is
finite[T]({i:T
|
vert(G!1)(i)
AND
V!1(i)})
Tactic
INST
"-1"
"vert(G!1)"
Premise 1.   (has proof of 3 steps)
-1.
subset?({i:T
|
vert(G!1)(i)
AND
V!1(i)},
vert(G!1))
IMPLIES
is
finite({i:T
|
vert(G!1)(i)
AND
V!1(i)})
1.
is
finite[T]({i:T
|
vert(G!1)(i)
AND
V!1(i)})