Theorem fnsn 6552

Description: Functionality and domain of the singleton of an ordered pair. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.)

Hypotheses

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

Assertion

Ref	Expression
fnsn	⊢ {⟨𝐴, 𝐵⟩} Fn {𝐴}

Proof of Theorem fnsn

Step	Hyp	Ref	Expression
1		fnsn.1	. 2 ⊢ 𝐴 ∈ V
2		fnsn.2	. 2 ⊢ 𝐵 ∈ V
3		fnsng 6546	. 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → {⟨𝐴, 𝐵⟩} Fn {𝐴})
4	1, 2, 3	mp2an 693	1 ⊢ {⟨𝐴, 𝐵⟩} Fn {𝐴}

Syntax hints:   ∈ wcel 2114  Vcvv 3430  {csn 4568  ⟨cop 4574   Fn wfn 6489

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-sep 5232  ax-pr 5372

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-mo 2540  df-clab 2716  df-cleq 2729  df-clel 2812  df-ral 3053  df-rex 3063  df-rab 3391  df-v 3432  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-br 5087  df-opab 5149  df-id 5521  df-xp 5632  df-rel 5633  df-cnv 5634  df-co 5635  df-dm 5636  df-fun 6496  df-fn 6497

This theorem is referenced by:  f1osn  6817  fnsnbOLD  7116  frrlem11  8241  frrlem12  8242  elixpsn  8880  axdc3lem4  10370  hashf1lem1  14412  axlowdimlem8  29036  axlowdimlem9  29037  axlowdimlem11  29039  axlowdimlem12  29040  bnj927  34932  cvmliftlem4  35490  cvmliftlem5  35491  finixpnum  37946  poimirlem3  37964