Mercurial > hg > Members > kono > Proof > ZF-in-agda
diff src/OD.agda @ 556:ba889c711524
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Fri, 29 Apr 2022 17:53:31 +0900 |
parents | b27d92694ed5 |
children | d6ad1af5299e 3938bed729a5 |
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--- a/src/OD.agda Fri Apr 29 15:52:11 2022 +0900 +++ b/src/OD.agda Fri Apr 29 17:53:31 2022 +0900 @@ -186,6 +186,12 @@ o≡→== : { x y : Ordinal } → x ≡ y → od (* x) == od (* y) o≡→== {x} {.x} refl = ==-refl +*≡*→≡ : { x y : Ordinal } → * x ≡ * y → x ≡ y +*≡*→≡ eq = subst₂ (λ j k → j ≡ k ) &iso &iso ( cong (&) eq ) + +&≡&→≡ : { x y : HOD } → & x ≡ & y → x ≡ y +&≡&→≡ eq = subst₂ (λ j k → j ≡ k ) *iso *iso ( cong (*) eq ) + o∅≡od∅ : * (o∅ ) ≡ od∅ o∅≡od∅ = ==→o≡ lemma where lemma0 : {x : Ordinal} → odef (* o∅) x → odef od∅ x