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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 5604 ssimaex 5707 unpreima 5772 respreima 5775 fconstfvm 5872 reldm 6349 rntpos 6423 frecsuclem 6572 iserd 6728 erth 6748 ecidg 6768 mapdm0 6832 map0e 6855 ixpiinm 6893 pw2f1odclem 7020 fifo 7179 ordiso2 7234 ctssdccl 7310 ctssdc 7312 finacn 7419 pw1if 7443 exmidapne 7479 acnccim 7491 genpassl 7744 genpassu 7745 1idprl 7810 1idpru 7811 sup3exmid 9137 eqreznegel 9848 iccid 10160 fzsplit2 10285 fzsn 10301 fzpr 10312 uzsplit 10327 fzoval 10383 infssuzex 10493 frec2uzrand 10667 bitsmod 12518 bitscmp 12520 divsfval 13412 mhmpropd 13550 eqgid 13814 ghmmhmb 13842 ghmpropd 13871 ablnsg 13922 opprsubgg 14099 opprunitd 14126 unitpropdg 14164 opprsubrngg 14227 subsubrng2 14231 subrngpropd 14232 subsubrg2 14262 subrgpropd 14269 rhmpropd 14270 lssats2 14430 lsspropdg 14447 discld 14862 restsn 14906 restdis 14910 cndis 14967 cnpdis 14968 tx1cn 14995 tx2cn 14996 blpnf 15126 blininf 15150 blres 15160 xmetec 15163 metrest 15232 xmetxpbl 15234 cnbl0 15260 reopnap 15272 bl2ioo 15276 cncfmet 15318 limcdifap 15388 gausslemma2dlem1a 15789 ushgredgedg 16079 ushgredgedgloop 16081 clwwlknun 16294 |
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