Theorem bdcsn 10661

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 10611	. . 3 |- BOUNDED y = x
2	1	bdcab 10640	. 2 |- BOUNDED { y | y = x }
3		df-sn 3404	. 2 |- { x } = { y | y = x }
4	2, 3	bdceqir 10635	1 |- BOUNDED { x }

Syntax hints:   {cab 2067   {csn 3398  BOUNDED wbdc 10631

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1376  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-4 1440  ax-17 1459  ax-ial 1467  ax-ext 2063  ax-bd0 10604  ax-bdeq 10611  ax-bdsb 10613

This theorem depends on definitions:  df-bi 115  df-clab 2068  df-cleq 2074  df-clel 2077  df-sn 3404  df-bdc 10632

This theorem is referenced by:  bdcpr  10662  bdctp  10663  bdvsn  10665  bdcsuc  10671