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Theorem funsn 6433
Description: A singleton of an ordered pair is a function. Theorem 10.5 of [Quine] p. 65. (Contributed by NM, 12-Aug-1994.)
Hypotheses
Ref Expression
funsn.1 𝐴 ∈ V
funsn.2 𝐵 ∈ V
Assertion
Ref Expression
funsn Fun {⟨𝐴, 𝐵⟩}

Proof of Theorem funsn
StepHypRef Expression
1 funsn.1 . 2 𝐴 ∈ V
2 funsn.2 . 2 𝐵 ∈ V
3 funsng 6431 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → Fun {⟨𝐴, 𝐵⟩})
41, 2, 3mp2an 692 1 Fun {⟨𝐴, 𝐵⟩}
Colors of variables: wff setvar class
Syntax hints:  wcel 2110  Vcvv 3408  {csn 4541  cop 4547  Fun wfun 6374
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2708  ax-sep 5192  ax-nul 5199  ax-pr 5322
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2071  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2886  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3410  df-dif 3869  df-un 3871  df-in 3873  df-ss 3883  df-nul 4238  df-if 4440  df-sn 4542  df-pr 4544  df-op 4548  df-br 5054  df-opab 5116  df-id 5455  df-xp 5557  df-rel 5558  df-cnv 5559  df-co 5560  df-fun 6382
This theorem is referenced by:  funtp  6437  fun0  6445  funop  6964  funsndifnop  6966  wfrlem13  8067  dcomex  10061  axdc3lem4  10067  cnfldfun  20375  bnj1421  32735  funop1  44447
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