Theorem bdcsuc 13915

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 13883	. . 3 |- BOUNDED x
2		bdcsn 13905	. . 3 |- BOUNDED { x }
3	1, 2	bdcun 13897	. 2 |- BOUNDED ( x u. { x } )
4		df-suc 4356	. 2 |- suc x = ( x u. { x } )
5	3, 4	bdceqir 13879	1 |- BOUNDED suc x

Syntax hints:   u. cun 3119   {csn 3583   suc csuc 4350  BOUNDED wbdc 13875

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 1440  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-4 1503  ax-17 1519  ax-ial 1527  ax-ext 2152  ax-bd0 13848  ax-bdor 13851  ax-bdeq 13855  ax-bdel 13856  ax-bdsb 13857

This theorem depends on definitions:  df-bi 116  df-clab 2157  df-cleq 2163  df-clel 2166  df-un 3125  df-sn 3589  df-suc 4356  df-bdc 13876

This theorem is referenced by:  bdeqsuc  13916