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Theorem bj-bd0el 13903
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.
StepHypRef Expression
1 bdeq0 13902 . 2  |- BOUNDED  y  =  (/)
21bj-bdcel 13872 1  |- BOUNDED  (/)  e.  x
Colors of variables: wff set class
Syntax hints:    e. wcel 2141   (/)c0 3414  BOUNDED wbd 13847
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152  ax-bd0 13848  ax-bdim 13849  ax-bdn 13852  ax-bdal 13853  ax-bdex 13854  ax-bdeq 13855
This theorem depends on definitions:  df-bi 116  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-dif 3123  df-in 3127  df-ss 3134  df-nul 3415  df-bdc 13876
This theorem is referenced by:  bj-d0clsepcl  13960  bj-bdind  13965
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