Theorem xpsn 7118

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 7116	. 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩})
4	1, 2, 3	mp2an 702	1 ⊢ ({𝐴} × {𝐵}) = {⟨𝐴, 𝐵⟩}

Syntax hints:   = wceq 1559   ∈ wcel 2141  Vcvv 3453  {csn 4579  ⟨cop 4585   × cxp 5641

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5243  ax-pr 5387

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-reu 3367  df-rab 3414  df-v 3455  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4284  df-if 4478  df-sn 4580  df-pr 4582  df-op 4586  df-br 5098  df-opab 5160  df-mpt 5179  df-id 5538  df-xp 5649  df-rel 5650  df-cnv 5651  df-co 5652  df-dm 5653  df-rn 5654  df-fun 6518  df-fn 6519  df-f 6520  df-f1 6521  df-fo 6522  df-f1o 6523

This theorem is referenced by:  dfmpt  7121  fpar  8089  mapsnconst  8868  ixpsnf1o  8914  dju1dif  10123  infdju1  10140  s1co  14840  mat1f1o  22526  txdis  23680  pt1hmeo  23854  utop2nei  24298  utop3cls  24299  imasdsf1olem  24421  ex-xp  30595  elrgspnlem4  33387  poimirlem3  38083  poimirlem4  38084  poimirlem9  38089  poimirlem28  38108  grposnOLD  38342  dib0  41749  imaf1hom  49690  setc1ocofval  50076  diag1f1olem  50115