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EmptyImpCS
⊢
empty
⊃
f
∗
EmptyImpCS
Proof:
1
⊢
f
∗
≡
empty
∨
f
+
def. of
∗
2
⊢
empty
⊃
f
∗
1
,
Prop
qed
Here is an straightforward corollary:
⊢
¬
f
∗
⊃
more
NotCSImpMore
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2023-09-12
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