| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 2298 | . 2 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ {𝑥 ∣ 𝜑}) |
| 3 | elab2g.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | 3 | elabg 2952 | . 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 2202 {cab 2217 |
| 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 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 |
| This theorem is referenced by: elab2 2954 elab4g 2955 eldif 3209 elun 3348 elin 3390 elif 3617 elsng 3684 elprg 3689 eluni 3896 eliun 3974 eliin 3975 elopab 4352 elong 4470 opeliunxp 4781 elrn2g 4920 eldmg 4926 elrnmpt 4981 elrnmpt1 4983 elimag 5080 elrnmpog 6134 eloprabi 6361 tfrlem3ag 6475 tfr1onlem3ag 6503 tfrcllemsucaccv 6520 elqsg 6754 elixp2 6871 isomni 7335 ismkv 7352 iswomni 7364 isacnm 7418 1idprl 7810 1idpru 7811 recexprlemell 7842 recexprlemelu 7843 mertenslemub 12097 mertenslemi1 12098 mertenslem2 12099 4sqexercise1 12973 4sqexercise2 12974 4sqlemsdc 12975 ismgm 13442 istopg 14726 isbasisg 14771 2sqlem8 15855 2sqlem9 15856 isuhgrm 15925 isushgrm 15926 isupgren 15949 isumgren 15959 isuspgren 16011 isusgren 16012 |
| Copyright terms: Public domain | W3C validator |