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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 1923 | . 2 ⊢ (𝜑 → ∀𝑥(𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| 3 | dfcleq 2228 | . 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 1396 = wceq 1398 ∈ wcel 2205 |
| 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 1496 ax-gen 1498 ax-17 1575 ax-ext 2216 |
| This theorem depends on definitions: df-bi 117 df-cleq 2227 |
| This theorem is referenced by: eqrdav 2233 abbi 2353 eqabdv 2365 csbcomg 3163 csbabg 3202 uneq1 3368 ineq1 3417 difin2 3485 difsn 3833 intmin4 3979 iunconstm 4001 iinconstm 4002 dfiun2g 4025 iindif2m 4061 iinin2m 4062 iunxsng 4069 iunxsngf 4071 iunpw 4603 opthprc 4803 inimasn 5182 dmsnopg 5236 dfco2a 5265 iotaeq 5323 fun11iun 5637 ssimaex 5740 unpreima 5804 respreima 5807 fconstfvm 5904 reldm 6382 suppimacnvfn 6448 suppcofn 6468 rntpos 6490 frecsuclem 6639 iserd 6795 erth 6815 ecidg 6835 mapdm0 6899 map0e 6922 ixpiinm 6961 pw2f1odclem 7089 fifo 7269 ordiso2 7328 ctssdccl 7404 ctssdc 7406 finacn 7513 pw1if 7537 exmidapne 7576 acnccim 7588 genpassl 7841 genpassu 7842 1idprl 7907 1idpru 7908 sup3exmid 9233 eqreznegel 9949 iccid 10261 fzsplit2 10387 fzsn 10403 fzpr 10415 uzsplit 10430 fzoval 10486 infssuzex 10597 frec2uzrand 10771 bitsmod 12646 bitscmp 12648 divsfval 13558 mhmpropd 13696 eqgid 13960 ghmmhmb 13988 ghmpropd 14017 ablnsg 14068 opprsubgg 14245 opprunitd 14272 unitpropdg 14310 opprsubrngg 14373 subsubrng2 14377 subrngpropd 14378 subsubrg2 14408 subrgpropd 14415 rhmpropd 14416 lssats2 14579 lsspropdg 14596 discld 15018 restsn 15062 restdis 15066 cndis 15123 cnpdis 15124 tx1cn 15151 tx2cn 15152 blpnf 15282 blininf 15306 blres 15316 xmetec 15319 metrest 15388 xmetxpbl 15390 cnbl0 15416 reopnap 15428 bl2ioo 15432 cncfmet 15474 limcdifap 15544 gausslemma2dlem1a 15948 ushgredgedg 16238 ushgredgedgloop 16240 clwwlknun 16453 eupth2lemsfi 16490 |
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