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Theorem xpsn 7142
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
StepHypRef Expression
1 xpsn.1 . 2 𝐴 ∈ V
2 xpsn.2 . 2 𝐵 ∈ V
3 xpsng 7141 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
41, 2, 3mp2an 705 1 ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩}
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   = wceq 1569   ∈ wcel 2144  Vcvv 3450  {csn 4584  ⟨cop 4834   × cxp 5648
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-reu 3366  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-fun 6541  df-fn 6542  df-f 6543  df-f1 6544  df-fo 6545  df-f1o 6546
This theorem is used by:  dfmpt  7148  fpar  8130  mapsnconst  8924  ixpsnf1o  8970  dju1dif  10255  infdju1  10272  s1co  14989  mat1f1o  22799  txdis  23957  pt1hmeo  24131  utop2nei  24575  utop3cls  24576  imasdsf1olem  24698  ex-xp  31043  elrgspnlem4  33853  poimirlem3  38635  poimirlem4  38636  poimirlem9  38641  poimirlem28  38660  grposnOLD  38910  dib0  42315  imaf1hom  50318  setc1ocofval  50723  diag1f1olem  50762
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