Theorem bdcsuc 15442

Description: The successor of a setvar is a bounded class. (Contributed by BJ, 16-Oct-2019.)

Assertion

Ref	Expression
bdcsuc	⊢ BOUNDED suc 𝑥

Proof of Theorem bdcsuc

Step	Hyp	Ref	Expression
1		bdcv 15410	. . 3 ⊢ BOUNDED 𝑥
2		bdcsn 15432	. . 3 ⊢ BOUNDED {𝑥}
3	1, 2	bdcun 15424	. 2 ⊢ BOUNDED (𝑥 ∪ {𝑥})
4		df-suc 4403	. 2 ⊢ suc 𝑥 = (𝑥 ∪ {𝑥})
5	3, 4	bdceqir 15406	1 ⊢ BOUNDED suc 𝑥

Syntax hints:   ∪ cun 3152  {csn 3619  suc csuc 4397  BOUNDED wbdc 15402

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-5 1458  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-4 1521  ax-17 1537  ax-ial 1545  ax-ext 2175  ax-bd0 15375  ax-bdor 15378  ax-bdeq 15382  ax-bdel 15383  ax-bdsb 15384

This theorem depends on definitions:  df-bi 117  df-clab 2180  df-cleq 2186  df-clel 2189  df-un 3158  df-sn 3625  df-suc 4403  df-bdc 15403

This theorem is referenced by:  bdeqsuc  15443