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| Mirrors > Home > ILE Home > Th. List > eqrdv | GIF version | ||
| Description: Deduce equality of classes from equivalence of membership. (Contributed by NM, 17-Mar-1996.) |
| Ref | Expression |
|---|---|
| eqrdv.1 | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| Ref | Expression |
|---|---|
| eqrdv | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqrdv.1 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) | |
| 2 | 1 | alrimiv 1920 | . 2 ⊢ (𝜑 → ∀𝑥(𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| 3 | dfcleq 2223 | . 2 ⊢ (𝐴 = 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) | |
| 4 | 2, 3 | sylibr 134 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 ∀wal 1393 = wceq 1395 ∈ wcel 2200 |
| 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-5 1493 ax-gen 1495 ax-17 1572 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 |
| This theorem is referenced by: eqrdav 2228 eqabdv 2358 csbcomg 3147 csbabg 3186 uneq1 3351 ineq1 3398 difin2 3466 difsn 3805 intmin4 3951 iunconstm 3973 iinconstm 3974 dfiun2g 3997 iindif2m 4033 iinin2m 4034 iunxsng 4041 iunxsngf 4043 iunpw 4571 opthprc 4770 inimasn 5146 dmsnopg 5200 dfco2a 5229 iotaeq 5287 fun11iun 5595 ssimaex 5697 unpreima 5762 respreima 5765 fconstfvm 5861 reldm 6338 rntpos 6409 frecsuclem 6558 iserd 6714 erth 6734 ecidg 6754 mapdm0 6818 map0e 6841 ixpiinm 6879 pw2f1odclem 7003 fifo 7158 ordiso2 7213 ctssdccl 7289 ctssdc 7291 finacn 7397 pw1if 7421 exmidapne 7457 acnccim 7469 genpassl 7722 genpassu 7723 1idprl 7788 1idpru 7789 sup3exmid 9115 eqreznegel 9821 iccid 10133 fzsplit2 10258 fzsn 10274 fzpr 10285 uzsplit 10300 fzoval 10356 infssuzex 10465 frec2uzrand 10639 bitsmod 12482 bitscmp 12484 divsfval 13376 mhmpropd 13514 eqgid 13778 ghmmhmb 13806 ghmpropd 13835 ablnsg 13886 opprsubgg 14062 opprunitd 14089 unitpropdg 14127 opprsubrngg 14190 subsubrng2 14194 subrngpropd 14195 subsubrg2 14225 subrgpropd 14232 rhmpropd 14233 lssats2 14393 lsspropdg 14410 discld 14825 restsn 14869 restdis 14873 cndis 14930 cnpdis 14931 tx1cn 14958 tx2cn 14959 blpnf 15089 blininf 15113 blres 15123 xmetec 15126 metrest 15195 xmetxpbl 15197 cnbl0 15223 reopnap 15235 bl2ioo 15239 cncfmet 15281 limcdifap 15351 gausslemma2dlem1a 15752 ushgredgedg 16039 ushgredgedgloop 16041 |
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