| Mathbox for BJ |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-bdind | GIF version | ||
| Description: Boundedness of the formula "the setvar 𝑥 is an inductive class". (Contributed by BJ, 30-Nov-2019.) |
| Ref | Expression |
|---|---|
| bj-bdind | ⊢ BOUNDED Ind 𝑥 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bj-bd0el 16463 | . . 3 ⊢ BOUNDED ∅ ∈ 𝑥 | |
| 2 | bj-bdsucel 16477 | . . . 4 ⊢ BOUNDED suc 𝑦 ∈ 𝑥 | |
| 3 | 2 | ax-bdal 16413 | . . 3 ⊢ BOUNDED ∀𝑦 ∈ 𝑥 suc 𝑦 ∈ 𝑥 |
| 4 | 1, 3 | ax-bdan 16410 | . 2 ⊢ BOUNDED (∅ ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 suc 𝑦 ∈ 𝑥) |
| 5 | df-bj-ind 16522 | . 2 ⊢ (Ind 𝑥 ↔ (∅ ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 suc 𝑦 ∈ 𝑥)) | |
| 6 | 4, 5 | bd0r 16420 | 1 ⊢ BOUNDED Ind 𝑥 |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ∈ wcel 2202 ∀wral 2510 ∅c0 3494 suc csuc 4462 BOUNDED wbd 16407 Ind wind 16521 |
| 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-ext 2213 ax-bd0 16408 ax-bdim 16409 ax-bdan 16410 ax-bdor 16411 ax-bdn 16412 ax-bdal 16413 ax-bdex 16414 ax-bdeq 16415 ax-bdel 16416 ax-bdsb 16417 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-fal 1403 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-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-sn 3675 df-suc 4468 df-bdc 16436 df-bj-ind 16522 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |