Theorem bdcnul 10656

Description: The empty class is bounded. See also bdcnulALT 10657. (Contributed by BJ, 3-Oct-2019.)

Assertion

Ref	Expression
bdcnul	|- BOUNDED (/)

Proof of Theorem bdcnul

Step	Hyp	Ref	Expression
1		noel 3255	. . 3 |- -. x e. (/)
2	1	bdnth 10625	. 2 |- BOUNDED x e. (/)
3	2	bdelir 10638	1 |- BOUNDED (/)

Syntax hints:   e. wcel 1433   (/)c0 3251  BOUNDED wbdc 10631

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 576  ax-in2 577  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-bd0 10604  ax-bdim 10605  ax-bdn 10608  ax-bdeq 10611

This theorem depends on definitions:  df-bi 115  df-tru 1287  df-fal 1290  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-v 2603  df-dif 2975  df-nul 3252  df-bdc 10632

This theorem is referenced by:  bdeq0  10658