Theorem bdcsuc 16243

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 16211	. . 3 |- BOUNDED x
2		bdcsn 16233	. . 3 |- BOUNDED { x }
3	1, 2	bdcun 16225	. 2 |- BOUNDED ( x u. { x } )
4		df-suc 4462	. 2 |- suc x = ( x u. { x } )
5	3, 4	bdceqir 16207	1 |- BOUNDED suc x

Syntax hints:   u. cun 3195   {csn 3666   suc csuc 4456  BOUNDED wbdc 16203

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 1493  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-4 1556  ax-17 1572  ax-ial 1580  ax-ext 2211  ax-bd0 16176  ax-bdor 16179  ax-bdeq 16183  ax-bdel 16184  ax-bdsb 16185

This theorem depends on definitions:  df-bi 117  df-clab 2216  df-cleq 2222  df-clel 2225  df-un 3201  df-sn 3672  df-suc 4462  df-bdc 16204

This theorem is referenced by:  bdeqsuc  16244