Theorem bj-bdcel 15483

Description: Boundedness of a membership formula. (Contributed by BJ, 8-Dec-2019.)

Hypothesis

Ref	Expression
bj-bdcel.bd	|- BOUNDED y = A

Assertion

Ref	Expression
bj-bdcel	|- BOUNDED A e. x

Distinct variable groups:   x, y   y, A

Allowed substitution hint:   A( x)

Proof of Theorem bj-bdcel

Step	Hyp	Ref	Expression
1		bj-bdcel.bd	. . 3 |- BOUNDED y = A
2	1	ax-bdex 15465	. 2 |- BOUNDED E. y e. x y = A
3		risset 2525	. 2 |- ( A e. x <-> E. y e. x y = A )
4	2, 3	bd0r 15471	1 |- BOUNDED A e. x

Syntax hints:   = wceq 1364   e. wcel 2167   E.wrex 2476  BOUNDED wbd 15458

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-ial 1548  ax-bd0 15459  ax-bdex 15465

This theorem depends on definitions:  df-bi 117  df-clel 2192  df-rex 2481

This theorem is referenced by:  bj-bd0el  15514  bj-bdsucel  15528