Theorem bdcnul 15427

Description: The empty class is bounded. See also bdcnulALT 15428. (Contributed by BJ, 3-Oct-2019.)

Assertion

Ref	Expression
bdcnul	|- BOUNDED (/)

Proof of Theorem bdcnul

Step	Hyp	Ref	Expression
1		noel 3451	. . 3 |- -. x e. (/)
2	1	bdnth 15396	. 2 |- BOUNDED x e. (/)
3	2	bdelir 15409	1 |- BOUNDED (/)

Syntax hints:   e. wcel 2164   (/)c0 3447  BOUNDED wbdc 15402

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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175  ax-bd0 15375  ax-bdim 15376  ax-bdn 15379  ax-bdeq 15382

This theorem depends on definitions:  df-bi 117  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-v 2762  df-dif 3156  df-nul 3448  df-bdc 15403

This theorem is referenced by:  bdeq0  15429