Theorem bdcint 15607

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 15551	. . . . 5 |- BOUNDED y e. z
2	1	ax-bdal 15548	. . . 4 |- BOUNDED A. z e. x y e. z
3		df-ral 2480	. . . 4 |- ( A. z e. x y e. z <-> A. z ( z e. x -> y e. z ) )
4	2, 3	bd0 15554	. . 3 |- BOUNDED A. z ( z e. x -> y e. z )
5	4	bdcab 15579	. 2 |- BOUNDED { y | A. z ( z e. x -> y e. z ) }
6		df-int 3876	. 2 |- |^| x = { y | A. z ( z e. x -> y e. z ) }
7	5, 6	bdceqir 15574	1 |- BOUNDED |^| x

Syntax hints:   -> wi 4   A.wal 1362   {cab 2182   A.wral 2475   |^|cint 3875  BOUNDED wbdc 15570

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 15543  ax-bdal 15548  ax-bdel 15551  ax-bdsb 15552

This theorem depends on definitions:  df-bi 117  df-clab 2183  df-cleq 2189  df-clel 2192  df-ral 2480  df-int 3876  df-bdc 15571

This theorem is referenced by: (None)