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CSChopImpCS
⊢
f
∗
;
f
⊃
f
∗
CSChopImpCS
Proof:
1
⊢
f
⊃
f
∗
ImpCS
2
⊢
f
∗
;
f
⊃
f
∗
;
f
∗
1
,
LeftChopImpChop
3
⊢
f
∗
;
f
∗
⊃
f
∗
CSChopCSImpCS
4
⊢
f
∗
;
f
⊃
f
∗
2
,
3
,
ImpChain
qed
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2024-08-03
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