Theorem bj-bd0el 16764

Description: Boundedness of the formula "the empty set belongs to the setvar x". (Contributed by BJ, 30-Nov-2019.)

Assertion

Ref	Expression
bj-bd0el	|- BOUNDED (/) e. x

Proof of Theorem bj-bd0el

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		bdeq0 16763	. 2 |- BOUNDED y = (/)
2	1	bj-bdcel 16733	1 |- BOUNDED (/) e. x

Syntax hints:   e. wcel 2205   (/)c0 3512  BOUNDED wbd 16708

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-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216  ax-bd0 16709  ax-bdim 16710  ax-bdn 16713  ax-bdal 16714  ax-bdex 16715  ax-bdeq 16716

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-dif 3216  df-in 3220  df-ss 3227  df-nul 3513  df-bdc 16737

This theorem is referenced by:  bj-d0clsepcl  16821  bj-bdind  16826