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Mirrors > Home > ILE Home > Th. List > eqeq12 | Unicode version |
Description: Equality relationship among 4 classes. (Contributed by NM, 3-Aug-1994.) |
Ref | Expression |
---|---|
eqeq12 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeq1 2146 | . 2 | |
2 | eqeq2 2149 | . 2 | |
3 | 1, 2 | sylan9bb 457 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1331 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-gen 1425 ax-4 1487 ax-17 1506 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-cleq 2132 |
This theorem is referenced by: eqeq12i 2153 eqeq12d 2154 eqeqan12d 2155 funopg 5157 tfri3 6264 th3qlem1 6531 xpdom2 6725 difinfsnlem 6984 difinfsn 6985 xrlttri3 9583 bcn1 10504 summodc 11152 prodmodc 11347 |
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