Conclusion
-1.
FORALL
x:T
:
D!1(x)
=
>
(vert(g!1)(x)
AND
V!1(x))
-2.
card(D!1)
>
=
p!1
-3.
FORALL
i_2016:T,
j
:
((NOT
(i_2016
=
j))
AND
D!1(i_2016)
AND
D!1(j))
IMPLIES
(NOT
((NOT
(i_2016
=
j))
AND
edges(g!1)(dbl[T](i_2016,
j))
AND
(FORALL
x:T
:
((x
=
i_2016)
OR
(x
=
j))
IMPLIES
V!1(x))))
1.
(FORALL
x:T
:
D!1(x)
=
>
vert(g!1)(x))
AND
(card(D!1)
>
=
p!1)
AND
(FORALL
i,
j
:
((NOT
(i
=
j))
AND
D!1(i)
AND
D!1(j))
IMPLIES
(NOT
((NOT
(i
=
j))
AND
edges(g!1)(dbl[T](i,
j)))))
Tactic
PROP
Premise 1.   (has proof of 3 steps)
-1.
FORALL
x:T
:
D!1(x)
=
>
(vert(g!1)(x)
AND
V!1(x))
-2.
card(D!1)
>
=
p!1
-3.
FORALL
i_2016:T,
j
:
((NOT
(i_2016
=
j))
AND
D!1(i_2016)
AND
D!1(j))
IMPLIES
(NOT
((NOT
(i_2016
=
j))
AND
edges(g!1)(dbl[T](i_2016,
j))
AND
(FORALL
x:T
:
((x
=
i_2016)
OR
(x
=
j))
IMPLIES
V!1(x))))
1.
FORALL
x:T
:
D!1(x)
=
>
vert(g!1)(x)
Premise 2.   (has proof of 13 steps)
-1.
FORALL
x:T
:
D!1(x)
=
>
(vert(g!1)(x)
AND
V!1(x))
-2.
card(D!1)
>
=
p!1
-3.
FORALL
i_2016:T,
j
:
((NOT
(i_2016
=
j))
AND
D!1(i_2016)
AND
D!1(j))
IMPLIES
(NOT
((NOT
(i_2016
=
j))
AND
edges(g!1)(dbl[T](i_2016,
j))
AND
(FORALL
x:T
:
((x
=
i_2016)
OR
(x
=
j))
IMPLIES
V!1(x))))
1.
FORALL
i,
j
:
((NOT
(i
=
j))
AND
D!1(i)
AND
D!1(j))
IMPLIES
(NOT
((NOT
(i
=
j))
AND
edges(g!1)(dbl[T](i,
j))))