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BaLeftChopImpChop
⊢
(
f
⊃
f
1
)
⊃
f
;
g
⊃
f
;
g
1
BaLeftChopImpChop
Proof:
1
⊢
(
f
⊃
f
1
)
⊃
(
f
⊃
f
1
)
BaImpBi
2
⊢
(
f
⊃
f
1
)
⊃
f
;
g
⊃
f
1
;
g
BiChopImpChop
3
⊢
(
f
⊃
f
1
)
⊃
f
;
g
⊃
f
1
;
g
1
,
2
,
Prop
qed
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2023-09-12
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