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SkipYieldsEqvWeakNext
⊢
skip
f
≡
f
SkipYieldsEqvWeakNext
Proof:
1
⊢
skip
;
¬
f
≡
¬
f
SkipChopEqvNext
2
⊢ ¬
(
skip
;
¬
f
)
≡¬
¬
f
1
,
Prop
3
⊢ ¬
¬
f
≡
f
PTL
4
⊢ ¬
(
skip
;
¬
f
)
≡
f
2
,
3
,
EqvChain
5
⊢
skip
f
≡
f
4
,
def. of
qed
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2023-09-12
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