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| Mirrors > Home > ILE Home > Th. List > eqriv | Unicode version | ||
| Description: Infer equality of classes from equivalence of membership. (Contributed by NM, 5-Aug-1993.) |
| Ref | Expression |
|---|---|
| eqriv.1 |
|
| Ref | Expression |
|---|---|
| eqriv |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfcleq 2223 |
. 2
| |
| 2 | eqriv.1 |
. 2
| |
| 3 | 1, 2 | mpgbir 1499 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-gen 1495 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 |
| This theorem is referenced by: eqid 2229 sb8ab 2351 cbvabw 2352 cbvab 2353 vjust 2801 nfccdeq 3027 csbcow 3136 difeqri 3325 uneqri 3347 incom 3397 ineqri 3398 difin 3442 invdif 3447 indif 3448 difundi 3457 indifdir 3461 rabsnif 3736 pwv 3890 uniun 3910 intun 3957 intpr 3958 iuncom 3974 iuncom4 3975 iun0 4025 0iun 4026 iunin2 4032 iunun 4047 iunxun 4048 iunxiun 4050 iinpw 4059 inuni 4243 unidif0 4255 unipw 4307 snnex 4543 unon 4607 xpiundi 4782 xpiundir 4783 0xp 4804 iunxpf 4876 cnvuni 4914 dmiun 4938 dmuni 4939 epini 5105 rniun 5145 cnvresima 5224 imaco 5240 rnco 5241 dfmpt3 5452 imaiun 5896 opabex3d 6278 opabex3 6279 ecid 6762 qsid 6764 mapval2 6842 ixpin 6887 dfz2 9542 infssuzex 10483 dfrp2 10513 1nprm 12676 infpn2 13067 rrgval 14266 2idlval 14506 cnfldui 14593 zrhval 14621 plyun0 15450 edgval 15901 clwwlkn0 16203 clwwlknonmpo 16223 clwwlknon 16224 clwwlk0on0 16226 |
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