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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 2965 | . 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 2967 elab4g 2968 eldif 3222 elun 3362 elin 3404 elif 3636 elsng 3706 elprg 3711 eluni 3919 eliun 3997 eliin 3998 elopab 4378 elong 4496 opeliunxp 4807 elrn2g 4947 eldmg 4953 elrnmpt 5008 elrnmpt1 5010 elimag 5107 elrnmpog 6168 eloprabi 6394 tfrlem3ag 6542 tfr1onlem3ag 6570 tfrcllemsucaccv 6587 elqsg 6821 elixp2 6939 isomni 7429 ismkv 7446 iswomni 7458 isacnm 7512 1idprl 7910 1idpru 7911 recexprlemell 7942 recexprlemelu 7943 mertenslemub 12228 mertenslemi1 12229 mertenslem2 12230 4sqexercise1 13104 4sqexercise2 13105 4sqlemsdc 13106 ballotfilemfmpn 13159 ismgm 13591 istopg 14913 isbasisg 14958 2sqlem8 16045 2sqlem9 16046 isuhgrm 16115 isushgrm 16116 isupgren 16139 isumgren 16149 isuspgren 16201 isusgren 16202 |
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