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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 16529 | . 2 ⊢ Ind ∩ {𝑥 ∈ V ∣ Ind 𝑥} | |
| 2 | bj-dfom 16531 | . . . 4 ⊢ ω = ∩ {𝑥 ∣ Ind 𝑥} | |
| 3 | rabab 2824 | . . . . 5 ⊢ {𝑥 ∈ V ∣ Ind 𝑥} = {𝑥 ∣ Ind 𝑥} | |
| 4 | 3 | inteqi 3932 | . . . 4 ⊢ ∩ {𝑥 ∈ V ∣ Ind 𝑥} = ∩ {𝑥 ∣ Ind 𝑥} |
| 5 | 2, 4 | eqtr4i 2255 | . . 3 ⊢ ω = ∩ {𝑥 ∈ V ∣ Ind 𝑥} |
| 6 | bj-indeq 16527 | . . 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 1397 {cab 2217 {crab 2514 Vcvv 2802 ∩ cint 3928 ωcom 4688 Ind wind 16524 |
| 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 619 ax-in2 620 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-13 2204 ax-14 2205 ax-ext 2213 ax-nul 4215 ax-pr 4299 ax-un 4530 ax-bd0 16411 ax-bdor 16414 ax-bdex 16417 ax-bdeq 16418 ax-bdel 16419 ax-bdsb 16420 ax-bdsep 16482 |
| 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-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-dif 3202 df-un 3204 df-nul 3495 df-sn 3675 df-pr 3676 df-uni 3894 df-int 3929 df-suc 4468 df-iom 4689 df-bdc 16439 df-bj-ind 16525 |
| This theorem is referenced by: bj-om 16535 bj-peano2 16537 peano5set 16538 |
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