Theorem bdcsn 15516

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 15466	. . 3 |- BOUNDED y = x
2	1	bdcab 15495	. 2 |- BOUNDED { y | y = x }
3		df-sn 3628	. 2 |- { x } = { y | y = x }
4	2, 3	bdceqir 15490	1 |- BOUNDED { x }

Syntax hints:   {cab 2182   {csn 3622  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-bdeq 15466  ax-bdsb 15468

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

This theorem is referenced by:  bdcpr  15517  bdctp  15518  bdvsn  15520  bdcsuc  15526