Theorem bdctp 16403

Description: The unordered triple of three setvars is bounded. (Contributed by BJ, 16-Oct-2019.)

Assertion

Ref	Expression
bdctp	⊢ BOUNDED {𝑥, 𝑦, 𝑧}

Proof of Theorem bdctp

Step	Hyp	Ref	Expression
1		bdcpr 16402	. . 3 ⊢ BOUNDED {𝑥, 𝑦}
2		bdcsn 16401	. . 3 ⊢ BOUNDED {𝑧}
3	1, 2	bdcun 16393	. 2 ⊢ BOUNDED ({𝑥, 𝑦} ∪ {𝑧})
4		df-tp 3675	. 2 ⊢ {𝑥, 𝑦, 𝑧} = ({𝑥, 𝑦} ∪ {𝑧})
5	3, 4	bdceqir 16375	1 ⊢ BOUNDED {𝑥, 𝑦, 𝑧}

Syntax hints:   ∪ cun 3196  {csn 3667  {cpr 3668  {ctp 3669  BOUNDED wbdc 16371

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 1493  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-4 1556  ax-17 1572  ax-ial 1580  ax-ext 2211  ax-bd0 16344  ax-bdor 16347  ax-bdeq 16351  ax-bdsb 16353

This theorem depends on definitions:  df-bi 117  df-clab 2216  df-cleq 2222  df-clel 2225  df-un 3202  df-sn 3673  df-pr 3674  df-tp 3675  df-bdc 16372

This theorem is referenced by: (None)