Theorem bdcsuc 15526

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 15494	. . 3 ⊢ BOUNDED 𝑥
2		bdcsn 15516	. . 3 ⊢ BOUNDED {𝑥}
3	1, 2	bdcun 15508	. 2 ⊢ BOUNDED (𝑥 ∪ {𝑥})
4		df-suc 4406	. 2 ⊢ suc 𝑥 = (𝑥 ∪ {𝑥})
5	3, 4	bdceqir 15490	1 ⊢ BOUNDED suc 𝑥

Syntax hints:   ∪ cun 3155  {csn 3622  suc csuc 4400  BOUNDED wbdc 15486

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 1461  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-4 1524  ax-17 1540  ax-ial 1548  ax-ext 2178  ax-bd0 15459  ax-bdor 15462  ax-bdeq 15466  ax-bdel 15467  ax-bdsb 15468

This theorem depends on definitions:  df-bi 117  df-clab 2183  df-cleq 2189  df-clel 2192  df-un 3161  df-sn 3628  df-suc 4406  df-bdc 15487

This theorem is referenced by:  bdeqsuc  15527