Theorem xpsn 6905

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 6903	. 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
4	1, 2, 3	mp2an 690	1 ⊢ ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩}

Syntax hints:   = wceq 1537   ∈ wcel 2114  Vcvv 3496  {csn 4569  ⟨cop 4575   × cxp 5555

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pr 5332

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-reu 3147  df-rab 3149  df-v 3498  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364

This theorem is referenced by:  dfmpt  6908  fpar  7813  mapsnconst  8458  ixpsnf1o  8504  dju1dif  9600  infdju1  9617  s1co  14197  mat1f1o  21089  txdis  22242  pt1hmeo  22416  utop2nei  22861  utop3cls  22862  imasdsf1olem  22985  ex-xp  28217  poimirlem3  34897  poimirlem4  34898  poimirlem9  34903  poimirlem28  34922  grposnOLD  35162  dib0  38302