∃1→∃
Theorem.
Arguments:
(sv),
(pr),
Dummy variables:
(sv),
Distinct variable conditions:
(
,
), (
,
),
Assertions:
(
)
Proof:
Hyp
Ref
Line
Expr
ax17-bv
1
(
bound in
)
1
df-∃1-alt1
2
(
(
([
/
]
(
))))
ex.andi
3
(
(
([
/
]
(
)))
(
([
/
]
(
))))
2, 3
brpi21
4
(
(
([
/
]
(
))))
4
siman<
5
(
)