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Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-omind | GIF version |
Description: ω is an inductive class. (Contributed by BJ, 30-Nov-2019.) |
Ref | Expression |
---|---|
bj-omind | ⊢ Ind ω |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bj-indint 13129 | . 2 ⊢ Ind ∩ {𝑥 ∈ V ∣ Ind 𝑥} | |
2 | bj-dfom 13131 | . . . 4 ⊢ ω = ∩ {𝑥 ∣ Ind 𝑥} | |
3 | rabab 2707 | . . . . 5 ⊢ {𝑥 ∈ V ∣ Ind 𝑥} = {𝑥 ∣ Ind 𝑥} | |
4 | 3 | inteqi 3775 | . . . 4 ⊢ ∩ {𝑥 ∈ V ∣ Ind 𝑥} = ∩ {𝑥 ∣ Ind 𝑥} |
5 | 2, 4 | eqtr4i 2163 | . . 3 ⊢ ω = ∩ {𝑥 ∈ V ∣ Ind 𝑥} |
6 | bj-indeq 13127 | . . 3 ⊢ (ω = ∩ {𝑥 ∈ V ∣ Ind 𝑥} → (Ind ω ↔ Ind ∩ {𝑥 ∈ V ∣ Ind 𝑥})) | |
7 | 5, 6 | ax-mp 5 | . 2 ⊢ (Ind ω ↔ Ind ∩ {𝑥 ∈ V ∣ Ind 𝑥}) |
8 | 1, 7 | mpbir 145 | 1 ⊢ Ind ω |
Colors of variables: wff set class |
Syntax hints: ↔ wb 104 = wceq 1331 {cab 2125 {crab 2420 Vcvv 2686 ∩ cint 3771 ωcom 4504 Ind wind 13124 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-nul 4054 ax-pr 4131 ax-un 4355 ax-bd0 13011 ax-bdor 13014 ax-bdex 13017 ax-bdeq 13018 ax-bdel 13019 ax-bdsb 13020 ax-bdsep 13082 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-rab 2425 df-v 2688 df-dif 3073 df-un 3075 df-nul 3364 df-sn 3533 df-pr 3534 df-uni 3737 df-int 3772 df-suc 4293 df-iom 4505 df-bdc 13039 df-bj-ind 13125 |
This theorem is referenced by: bj-om 13135 bj-peano2 13137 peano5set 13138 |
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