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| 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 16584 | . . 3 ⊢ BOUNDED ∅ ∈ 𝑥 | |
| 2 | bj-bdsucel 16598 | . . . 4 ⊢ BOUNDED suc 𝑦 ∈ 𝑥 | |
| 3 | 2 | ax-bdal 16534 | . . 3 ⊢ BOUNDED ∀𝑦 ∈ 𝑥 suc 𝑦 ∈ 𝑥 |
| 4 | 1, 3 | ax-bdan 16531 | . 2 ⊢ BOUNDED (∅ ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 suc 𝑦 ∈ 𝑥) |
| 5 | df-bj-ind 16643 | . 2 ⊢ (Ind 𝑥 ↔ (∅ ∈ 𝑥 ∧ ∀𝑦 ∈ 𝑥 suc 𝑦 ∈ 𝑥)) | |
| 6 | 4, 5 | bd0r 16541 | 1 ⊢ BOUNDED Ind 𝑥 |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ∈ wcel 2202 ∀wral 2511 ∅c0 3496 suc csuc 4468 BOUNDED wbd 16528 Ind wind 16642 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 ax-bd0 16529 ax-bdim 16530 ax-bdan 16531 ax-bdor 16532 ax-bdn 16533 ax-bdal 16534 ax-bdex 16535 ax-bdeq 16536 ax-bdel 16537 ax-bdsb 16538 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-sn 3679 df-suc 4474 df-bdc 16557 df-bj-ind 16643 |
| This theorem is referenced by: (None) |
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