Theorem bdcab 17041

Description: A class defined by class abstraction using a bounded formula is bounded. (Contributed by BJ, 6-Oct-2019.)

Hypothesis

Ref	Expression
bdcab.1	|- BOUNDED ph

Assertion

Ref	Expression
bdcab	|- BOUNDED { x | ph }

Proof of Theorem bdcab

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		bdcab.1	. . 3 |- BOUNDED ph
2	1	bdab 17030	. 2 |- BOUNDED y e. { x | ph }
3	2	bdelir 17039	1 |- BOUNDED { x | ph }

This proof depends on syntax axioms:   {cab 2224  BOUNDED wbd 17004  BOUNDED wbdc 17032

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-gen 1502  ax-bd0 17005  ax-bdsb 17014

This proof depends on definitions:  df-bi 117  df-clab 2225  df-bdc 17033

This theorem is used by:  bds  17043  bdcrab  17044  bdccsb  17052  bdcdif  17053  bdcun  17054  bdcin  17055  bdcpw  17061  bdcsn  17062  bdcuni  17068  bdcint  17069  bdciun  17070  bdciin  17071  bdcriota  17075  bj-bdfindis  17139