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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 1922 | . 2 ⊢ (𝜑 → ∀𝑥(𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| 3 | dfcleq 2225 | . 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 1395 = wceq 1397 ∈ wcel 2202 |
| 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 1495 ax-gen 1497 ax-17 1574 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 |
| This theorem is referenced by: eqrdav 2230 eqabdv 2360 csbcomg 3150 csbabg 3189 uneq1 3354 ineq1 3401 difin2 3469 difsn 3810 intmin4 3956 iunconstm 3978 iinconstm 3979 dfiun2g 4002 iindif2m 4038 iinin2m 4039 iunxsng 4046 iunxsngf 4048 iunpw 4577 opthprc 4777 inimasn 5154 dmsnopg 5208 dfco2a 5237 iotaeq 5295 fun11iun 5605 ssimaex 5708 unpreima 5773 respreima 5776 fconstfvm 5873 reldm 6352 rntpos 6426 frecsuclem 6575 iserd 6731 erth 6751 ecidg 6771 mapdm0 6835 map0e 6858 ixpiinm 6896 pw2f1odclem 7023 fifo 7182 ordiso2 7237 ctssdccl 7313 ctssdc 7315 finacn 7422 pw1if 7446 exmidapne 7482 acnccim 7494 genpassl 7747 genpassu 7748 1idprl 7813 1idpru 7814 sup3exmid 9140 eqreznegel 9851 iccid 10163 fzsplit2 10288 fzsn 10304 fzpr 10315 uzsplit 10330 fzoval 10386 infssuzex 10497 frec2uzrand 10671 bitsmod 12538 bitscmp 12540 divsfval 13432 mhmpropd 13570 eqgid 13834 ghmmhmb 13862 ghmpropd 13891 ablnsg 13942 opprsubgg 14119 opprunitd 14146 unitpropdg 14184 opprsubrngg 14247 subsubrng2 14251 subrngpropd 14252 subsubrg2 14282 subrgpropd 14289 rhmpropd 14290 lssats2 14450 lsspropdg 14467 discld 14887 restsn 14931 restdis 14935 cndis 14992 cnpdis 14993 tx1cn 15020 tx2cn 15021 blpnf 15151 blininf 15175 blres 15185 xmetec 15188 metrest 15257 xmetxpbl 15259 cnbl0 15285 reopnap 15297 bl2ioo 15301 cncfmet 15343 limcdifap 15413 gausslemma2dlem1a 15814 ushgredgedg 16104 ushgredgedgloop 16106 clwwlknun 16319 eupth2lemsfi 16356 |
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