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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 3148 csbabg 3187 uneq1 3352 ineq1 3399 difin2 3467 difsn 3808 intmin4 3954 iunconstm 3976 iinconstm 3977 dfiun2g 4000 iindif2m 4036 iinin2m 4037 iunxsng 4044 iunxsngf 4046 iunpw 4575 opthprc 4775 inimasn 5152 dmsnopg 5206 dfco2a 5235 iotaeq 5293 fun11iun 5601 ssimaex 5703 unpreima 5768 respreima 5771 fconstfvm 5867 reldm 6344 rntpos 6418 frecsuclem 6567 iserd 6723 erth 6743 ecidg 6763 mapdm0 6827 map0e 6850 ixpiinm 6888 pw2f1odclem 7015 fifo 7170 ordiso2 7225 ctssdccl 7301 ctssdc 7303 finacn 7409 pw1if 7433 exmidapne 7469 acnccim 7481 genpassl 7734 genpassu 7735 1idprl 7800 1idpru 7801 sup3exmid 9127 eqreznegel 9838 iccid 10150 fzsplit2 10275 fzsn 10291 fzpr 10302 uzsplit 10317 fzoval 10373 infssuzex 10483 frec2uzrand 10657 bitsmod 12507 bitscmp 12509 divsfval 13401 mhmpropd 13539 eqgid 13803 ghmmhmb 13831 ghmpropd 13860 ablnsg 13911 opprsubgg 14087 opprunitd 14114 unitpropdg 14152 opprsubrngg 14215 subsubrng2 14219 subrngpropd 14220 subsubrg2 14250 subrgpropd 14257 rhmpropd 14258 lssats2 14418 lsspropdg 14435 discld 14850 restsn 14894 restdis 14898 cndis 14955 cnpdis 14956 tx1cn 14983 tx2cn 14984 blpnf 15114 blininf 15138 blres 15148 xmetec 15151 metrest 15220 xmetxpbl 15222 cnbl0 15248 reopnap 15260 bl2ioo 15264 cncfmet 15306 limcdifap 15376 gausslemma2dlem1a 15777 ushgredgedg 16065 ushgredgedgloop 16067 clwwlknun 16236 |
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