Theorem bdcsn 13752

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

Assertion

Ref	Expression
bdcsn	|- BOUNDED { x }

Proof of Theorem bdcsn

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ax-bdeq 13702	. . 3 |- BOUNDED y = x
2	1	bdcab 13731	. 2 |- BOUNDED { y | y = x }
3		df-sn 3582	. 2 |- { x } = { y | y = x }
4	2, 3	bdceqir 13726	1 |- BOUNDED { x }

Syntax hints:   {cab 2151   {csn 3576  BOUNDED wbdc 13722

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 1435  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-4 1498  ax-17 1514  ax-ial 1522  ax-ext 2147  ax-bd0 13695  ax-bdeq 13702  ax-bdsb 13704

This theorem depends on definitions:  df-bi 116  df-clab 2152  df-cleq 2158  df-clel 2161  df-sn 3582  df-bdc 13723

This theorem is referenced by:  bdcpr  13753  bdctp  13754  bdvsn  13756  bdcsuc  13762