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OrYieldsImp
⊢
(
f
∨
f
1
)
g
≡
(
f
g
)
∧
(
f
1
g
)
OrYieldsImp
Proof:
1
⊢
(
f
∨
f
1
) ;
¬
g
≡
f
;
¬
g
∨
f
1
;
¬
g
OrChopEqv
2
⊢ ¬
((
f
∨
f
) ;
¬
g
)
≡¬
(
f
;
¬
g
)
∧¬
(
f
1
;
¬
g
)
1
,
Prop
3
⊢
(
f
∨
f
1
)
g
≡
(
f
g
)
∧
(
f
1
g
)
2
,
def. of
qed
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2024-08-03
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