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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 16940 | . 2 ⊢ Ind ∩ {𝑥 ∈ V ∣ Ind 𝑥} | |
| 2 | bj-dfom 16942 | . . . 4 ⊢ ω = ∩ {𝑥 ∣ Ind 𝑥} | |
| 3 | rabab 2843 | . . . . 5 ⊢ {𝑥 ∈ V ∣ Ind 𝑥} = {𝑥 ∣ Ind 𝑥} | |
| 4 | 3 | inteqi 3972 | . . . 4 ⊢ ∩ {𝑥 ∈ V ∣ Ind 𝑥} = ∩ {𝑥 ∣ Ind 𝑥} |
| 5 | 2, 4 | eqtr4i 2262 | . . 3 ⊢ ω = ∩ {𝑥 ∈ V ∣ Ind 𝑥} |
| 6 | bj-indeq 16938 | . . 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 146 | 1 ⊢ Ind ω |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 = wceq 1402 {cab 2224 {crab 2532 Vcvv 2821 ∩ cint 3968 ωcom 4735 Ind wind 16935 |
| 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-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-nul 4257 ax-pr 4344 ax-un 4576 ax-bd0 16822 ax-bdor 16825 ax-bdex 16828 ax-bdeq 16829 ax-bdel 16830 ax-bdsep 16893 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-nul 3521 df-sn 3714 df-pr 3715 df-uni 3934 df-int 3969 df-suc 4514 df-iom 4736 df-bj-ind 16936 |
| This theorem is referenced by: bj-om 16946 bj-peano2 16948 peano5set 16949 |
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