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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 1927 | . 2 ⊢ (𝜑 → ∀𝑥(𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| 3 | dfcleq 2232 | . 2 ⊢ (𝐴 = 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) | |
| 4 | 2, 3 | sylibr 134 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 ∀wal 1400 = wceq 1402 ∈ wcel 2209 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-17 1579 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 |
| This theorem is used by: eqrdav 2237 abbi 2357 eqabdv 2369 csbcomg 3170 csbabg 3209 uneq1 3376 ineq1 3425 difin2 3493 difsn 3852 intmin4 3998 iunconstm 4020 iinconstm 4021 dfiun2g 4044 iindif2m 4080 iinin2m 4081 iunxsng 4088 iunxsngf 4090 iunpw 4626 opthprc 4826 inimasn 5205 dmsnopg 5259 dfco2a 5288 iotaeq 5346 fun11iun 5660 relndmfv 5728 ssimaex 5764 unpreima 5833 respreima 5836 fconstfvm 5933 reldm 6420 suppimacnvfn 6486 suppcofn 6506 rntpos 6528 frecsuclem 6677 iserd 6833 erth 6853 ecidg 6873 mapdm0 6937 mapfset 6945 map0e 6967 ixpiinm 7006 pw2f1odclem 7134 fifo 7314 ordiso2 7375 ctssdccl 7451 ctssdc 7453 finacn 7560 pw1if 7584 exmidapne 7626 acnccim 7638 genpassl 7891 genpassu 7892 1idprl 7957 1idpru 7958 sup3exmid 9289 indval0 9299 eqreznegel 10023 iccid 10337 fzsplit2 10465 fzsplit3 10468 fzsn 10482 fzpr 10494 uzsplit 10509 fzoval 10565 infssuzex 10676 frec2uzrand 10855 bitsmod 12739 bitscmp 12741 divsfval 13698 mhmpropd 13822 eqgid 14078 ghmmhmb 14106 ghmpropd 14135 ablnsg 14187 opprsubgg 14439 opprunitd 14466 unitpropdg 14504 opprsubrngg 14568 subsubrng2 14572 subrngpropd 14573 subsubrg2 14603 subrgpropd 14610 rhmpropd 14611 ringunitsap0 14643 drnguiap 14658 lssats2 14800 lsspropdg 14817 discld 15286 restsn 15330 restdis 15334 cndis 15391 cnpdis 15392 tx1cn 15419 tx2cn 15420 blpnf 15550 blininf 15574 blres 15584 xmetec 15587 metrest 15656 xmetxpbl 15658 cnbl0 15684 reopnap 15696 bl2ioo 15700 cncfmet 15742 limcdifap 15812 gausslemma2dlem1a 16275 ushgredgedg 16565 ushgredgedgloop 16567 clwwlknun 16780 eupth2lemsfi 16817 |
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