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| Mirrors > Home > ILE Home > Th. List > elab2g | GIF version | ||
| Description: Membership in a class abstraction, using implicit substitution. (Contributed by NM, 13-Sep-1995.) |
| Ref | Expression |
|---|---|
| elab2g.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
| elab2g.2 | ⊢ 𝐵 = {𝑥 ∣ 𝜑} |
| Ref | Expression |
|---|---|
| elab2g | ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ 𝐵 ↔ 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elab2g.2 | . . 3 ⊢ 𝐵 = {𝑥 ∣ 𝜑} | |
| 2 | 1 | eleq2i 2301 | . 2 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ {𝑥 ∣ 𝜑}) |
| 3 | elab2g.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | 3 | elabg 2966 | . 2 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ {𝑥 ∣ 𝜑} ↔ 𝜓)) |
| 5 | 2, 4 | bitrid 192 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∈ 𝐵 ↔ 𝜓)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1398 ∈ wcel 2205 {cab 2220 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2216 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 |
| This theorem is referenced by: elab2 2968 elab4g 2969 eldif 3223 elun 3364 elin 3406 elif 3638 elsng 3709 elprg 3714 eluni 3922 eliun 4000 eliin 4001 elopab 4381 elong 4499 opeliunxp 4810 elrn2g 4950 eldmg 4956 elrnmpt 5011 elrnmpt1 5013 elimag 5110 elrnmpog 6174 eloprabi 6405 tfrlem3ag 6553 tfr1onlem3ag 6581 tfrcllemsucaccv 6598 elqsg 6832 elixp2 6950 isomni 7440 ismkv 7457 iswomni 7469 isacnm 7523 1idprl 7921 1idpru 7922 recexprlemell 7953 recexprlemelu 7954 mertenslemub 12248 mertenslemi1 12249 mertenslem2 12250 4sqexercise1 13124 4sqexercise2 13125 4sqlemsdc 13126 ballotfilemfmpn 13181 ismgm 13623 istopg 14993 isbasisg 15038 2sqlem8 16125 2sqlem9 16126 isuhgrm 16195 isushgrm 16196 isupgren 16219 isumgren 16229 isuspgren 16281 isusgren 16282 |
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