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ChopAndNotFin

⊢ f ; g ∧¬fin w ≡ f ; (g ∧¬fin w) ChopAndNotFin

Proof:

1
⊢ f ; g ∧fin ¬w ≡ f ; (g ∧fin ¬w)
ChopAndFin
2
⊢ fin ¬w ≡¬fin w
PTL
3
⊢ g ∧fin ¬w ≡ g ∧¬fin w
2,Prop
4
⊢ f ; (g ∧fin ¬w) ≡ f ; (g ∧¬fin w)
3,LeftChopEqvChop
5
⊢ f ; g ∧¬fin w ≡ f ; (g ∧¬fin w)
1, 2, 4,Prop

qed

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2024-08-03
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