Theorem xpsn 7135

Description: The Cartesian product of two singletons is the singleton consisting in the associated ordered pair. (Contributed by NM, 4-Nov-2006.)

Hypotheses

Ref	Expression
xpsn.1	⊢ 𝐴 ∈ V
xpsn.2	⊢ 𝐵 ∈ V

Assertion

Ref	Expression
xpsn	⊢ ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩}

Proof of Theorem xpsn

Step	Hyp	Ref	Expression
1		xpsn.1	. 2 ⊢ 𝐴 ∈ V
2		xpsn.2	. 2 ⊢ 𝐵 ∈ V
3		xpsng 7133	. 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
4	1, 2, 3	mp2an 704	1 ⊢ ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩}

Syntax hints:   = wceq 1567   ∈ wcel 2149  Vcvv 3463  {csn 4591  ⟨cop 4597   × cxp 5657

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5258  ax-pr 5402

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-reu 3377  df-rab 3424  df-v 3465  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4490  df-sn 4592  df-pr 4594  df-op 4598  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-fun 6535  df-fn 6536  df-f 6537  df-f1 6538  df-fo 6539  df-f1o 6540

This theorem is referenced by:  dfmpt  7138  fpar  8107  mapsnconst  8886  ixpsnf1o  8932  dju1dif  10152  infdju1  10169  s1co  14866  mat1f1o  22600  txdis  23754  pt1hmeo  23928  utop2nei  24372  utop3cls  24373  imasdsf1olem  24495  ex-xp  30724  elrgspnlem4  33502  poimirlem3  38157  poimirlem4  38158  poimirlem9  38163  poimirlem28  38182  grposnOLD  38416  dib0  41823  imaf1hom  49764  setc1ocofval  50150  diag1f1olem  50189