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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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