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BfEqvBfRule
⊢
f
≡
g
⇒ ⊢
f
≡
g
BfEqvBfRule
Proof:
1
f
≡
g
Assump
2
f
⊃
g
1
,
Prop
3
f
⊃
g
2
,
BfImpBfRule
4
g
⊃
f
1
,
Prop
5
g
⊃
f
4
,
BfImpBfRule
6
f
≡
g
3
,
5
,
Prop
qed
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2024-08-03
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