Theorem bdcsn 16896

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 16846	. . 3 |- BOUNDED y = x
2	1	bdcab 16875	. 2 |- BOUNDED { y | y = x }
3		df-sn 3715	. 2 |- { x } = { y | y = x }
4	2, 3	bdceqir 16870	1 |- BOUNDED { x }

This proof depends on syntax axioms:   {cab 2224   {csn 3709  BOUNDED wbdc 16866

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-4 1563  ax-17 1579  ax-ial 1587  ax-ext 2220  ax-bd0 16839  ax-bdeq 16846  ax-bdsb 16848

This proof depends on definitions:  df-bi 117  df-clab 2225  df-cleq 2231  df-clel 2234  df-sn 3715  df-bdc 16867

This theorem is used by:  bdcpr  16897  bdctp  16898  bdvsn  16900  bdcsuc  16906