Theorem xpsn 7013

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 7011	. 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
4	1, 2, 3	mp2an 689	1 ⊢ ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩}

Syntax hints:   = wceq 1539   ∈ wcel 2106  Vcvv 3432  {csn 4561  ⟨cop 4567   × cxp 5587

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pr 5352

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-reu 3072  df-rab 3073  df-v 3434  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-br 5075  df-opab 5137  df-mpt 5158  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440

This theorem is referenced by:  dfmpt  7016  fpar  7956  mapsnconst  8680  ixpsnf1o  8726  dju1dif  9928  infdju1  9945  s1co  14546  mat1f1o  21627  txdis  22783  pt1hmeo  22957  utop2nei  23402  utop3cls  23403  imasdsf1olem  23526  ex-xp  28800  poimirlem3  35780  poimirlem4  35781  poimirlem9  35786  poimirlem28  35805  grposnOLD  36040  dib0  39178