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Theorem brdom 8932
Description: Dominance relation. (Contributed by NM, 15-Jun-1998.)
Hypothesis
Ref Expression
bren.1 𝐵 ∈ V
Assertion
Ref Expression
brdom (𝐴𝐵 ↔ ∃𝑓 𝑓:𝐴1-1𝐵)
Distinct variable groups:   𝐴,𝑓   𝐵,𝑓

Proof of Theorem brdom
StepHypRef Expression
1 bren.1 . 2 𝐵 ∈ V
2 brdomg 8930 . 2 (𝐵 ∈ V → (𝐴𝐵 ↔ ∃𝑓 𝑓:𝐴1-1𝐵))
31, 2ax-mp 5 1 (𝐴𝐵 ↔ ∃𝑓 𝑓:𝐴1-1𝐵)
Colors of variables: wff setvar class
Syntax hints:  wb 206  wex 1779  wcel 2109  Vcvv 3447   class class class wbr 5107  1-1wf1 6508  cdom 8916
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2701  ax-sep 5251  ax-nul 5261  ax-pr 5387  ax-un 7711
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-ral 3045  df-rex 3054  df-rab 3406  df-v 3449  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-nul 4297  df-if 4489  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-br 5108  df-opab 5170  df-xp 5644  df-rel 5645  df-cnv 5646  df-dm 5648  df-rn 5649  df-fn 6514  df-f 6515  df-f1 6516  df-dom 8920
This theorem is referenced by:  domen  8933  domtr  8978  sbthlem10  9060  sbthfilem  9162  1sdomOLD  9196  ac10ct  9987  domtriomlem  10395  2ndcdisj  23343  birthdaylem3  26863
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