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LeftChopImpChop
⊢
f
⊃
f
1
⇒ ⊢
f
;
g
⊃
f
1
;
g
LeftChopImpChop
Proof:
1
⊢
f
⊃
f
1
given
2
⊢
(
f
⊃
f
1
)
1
,
BiGen
3
⊢
(
f
⊃
f
1
)
⊃
f
;
g
⊃
f
1
;
g
BiChopImpChop
4
⊢
f
;
g
⊃
f
1
;
g
2
,
3
,
MP
qed
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2024-08-03
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