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Mirrors > Home > ILE Home > Th. List > Mathboxes > bdcsuc | GIF version |
Description: The successor of a setvar is a bounded class. (Contributed by BJ, 16-Oct-2019.) |
Ref | Expression |
---|---|
bdcsuc | ⊢ BOUNDED suc 𝑥 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bdcv 13046 | . . 3 ⊢ BOUNDED 𝑥 | |
2 | bdcsn 13068 | . . 3 ⊢ BOUNDED {𝑥} | |
3 | 1, 2 | bdcun 13060 | . 2 ⊢ BOUNDED (𝑥 ∪ {𝑥}) |
4 | df-suc 4293 | . 2 ⊢ suc 𝑥 = (𝑥 ∪ {𝑥}) | |
5 | 3, 4 | bdceqir 13042 | 1 ⊢ BOUNDED suc 𝑥 |
Colors of variables: wff set class |
Syntax hints: ∪ cun 3069 {csn 3527 suc csuc 4287 BOUNDED wbdc 13038 |
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-5 1423 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-4 1487 ax-17 1506 ax-ial 1514 ax-ext 2121 ax-bd0 13011 ax-bdor 13014 ax-bdeq 13018 ax-bdel 13019 ax-bdsb 13020 |
This theorem depends on definitions: df-bi 116 df-clab 2126 df-cleq 2132 df-clel 2135 df-un 3075 df-sn 3533 df-suc 4293 df-bdc 13039 |
This theorem is referenced by: bdeqsuc 13079 |
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