Theorem funopabeq 6454

Description: A class of ordered pairs of values is a function. (Contributed by NM, 14-Nov-1995.)

Assertion

Ref	Expression
funopabeq	⊢ Fun {⟨𝑥, 𝑦⟩ ∣ 𝑦 = 𝐴}

Distinct variable groups:   𝑥,𝑦   𝑦,𝐴

Allowed substitution hint:   𝐴(𝑥)

Proof of Theorem funopabeq

Step	Hyp	Ref	Expression
1		funopab 6453	. 2 ⊢ (Fun {⟨𝑥, 𝑦⟩ ∣ 𝑦 = 𝐴} ↔ ∀𝑥∃*𝑦 𝑦 = 𝐴)
2		moeq 3637	. 2 ⊢ ∃*𝑦 𝑦 = 𝐴
3	1, 2	mpgbir 1803	1 ⊢ Fun {⟨𝑥, 𝑦⟩ ∣ 𝑦 = 𝐴}

Syntax hints:   = wceq 1539  ∃*wmo 2538  {copab 5132  Fun wfun 6412

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pr 5347

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ral 3068  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-br 5071  df-opab 5133  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-fun 6420

This theorem is referenced by:  funopab4  6455