Theorem bdcint 14925

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

Assertion

Ref	Expression
bdcint	|- BOUNDED |^| x

Proof of Theorem bdcint

Dummy variables y z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ax-bdel 14869	. . . . 5 |- BOUNDED y e. z
2	1	ax-bdal 14866	. . . 4 |- BOUNDED A. z e. x y e. z
3		df-ral 2470	. . . 4 |- ( A. z e. x y e. z <-> A. z ( z e. x -> y e. z ) )
4	2, 3	bd0 14872	. . 3 |- BOUNDED A. z ( z e. x -> y e. z )
5	4	bdcab 14897	. 2 |- BOUNDED { y | A. z ( z e. x -> y e. z ) }
6		df-int 3857	. 2 |- |^| x = { y | A. z ( z e. x -> y e. z ) }
7	5, 6	bdceqir 14892	1 |- BOUNDED |^| x

Syntax hints:   -> wi 4   A.wal 1361   {cab 2173   A.wral 2465   |^|cint 3856  BOUNDED wbdc 14888

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 1457  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-4 1520  ax-17 1536  ax-ial 1544  ax-ext 2169  ax-bd0 14861  ax-bdal 14866  ax-bdel 14869  ax-bdsb 14870

This theorem depends on definitions:  df-bi 117  df-clab 2174  df-cleq 2180  df-clel 2183  df-ral 2470  df-int 3857  df-bdc 14889

This theorem is referenced by: (None)