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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 2297 | . 2 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ {𝑥 ∣ 𝜑}) |
| 3 | elab2g.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | 3 | elabg 2951 | . 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 1397 ∈ wcel 2201 {cab 2216 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2212 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-v 2803 |
| This theorem is referenced by: elab2 2953 elab4g 2954 eldif 3208 elun 3347 elin 3389 elif 3618 elsng 3685 elprg 3690 eluni 3897 eliun 3975 eliin 3976 elopab 4354 elong 4472 opeliunxp 4783 elrn2g 4922 eldmg 4928 elrnmpt 4983 elrnmpt1 4985 elimag 5082 elrnmpog 6139 eloprabi 6366 tfrlem3ag 6480 tfr1onlem3ag 6508 tfrcllemsucaccv 6525 elqsg 6759 elixp2 6876 isomni 7340 ismkv 7357 iswomni 7369 isacnm 7423 1idprl 7815 1idpru 7816 recexprlemell 7847 recexprlemelu 7848 mertenslemub 12118 mertenslemi1 12119 mertenslem2 12120 4sqexercise1 12994 4sqexercise2 12995 4sqlemsdc 12996 ismgm 13463 istopg 14752 isbasisg 14797 2sqlem8 15881 2sqlem9 15882 isuhgrm 15951 isushgrm 15952 isupgren 15975 isumgren 15985 isuspgren 16037 isusgren 16038 |
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