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Theorem xpdom1 9071
Description: Dominance law for Cartesian product. Theorem 6L(c) of [Enderton] p. 149. (Contributed by NM, 28-Sep-2004.) (Revised by NM, 29-Mar-2006.) (Revised by Mario Carneiro, 7-May-2015.)
Hypothesis
Ref Expression
xpdom1.2 𝐶 ∈ V
Assertion
Ref Expression
xpdom1 (𝐴𝐵 → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶))

Proof of Theorem xpdom1
StepHypRef Expression
1 xpdom1.2 . 2 𝐶 ∈ V
2 xpdom1g 9069 . 2 ((𝐶 ∈ V ∧ 𝐴𝐵) → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶))
31, 2mpan 689 1 (𝐴𝐵 → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2107  Vcvv 3475   class class class wbr 5149   × cxp 5675  cdom 8937
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-sep 5300  ax-nul 5307  ax-pow 5364  ax-pr 5428  ax-un 7725
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2942  df-ral 3063  df-rex 3072  df-rab 3434  df-v 3477  df-sbc 3779  df-csb 3895  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4324  df-if 4530  df-pw 4605  df-sn 4630  df-pr 4632  df-op 4636  df-uni 4910  df-br 5150  df-opab 5212  df-mpt 5233  df-id 5575  df-xp 5683  df-rel 5684  df-cnv 5685  df-co 5686  df-dm 5687  df-rn 5688  df-res 5689  df-ima 5690  df-iota 6496  df-fun 6546  df-fn 6547  df-f 6548  df-f1 6549  df-fo 6550  df-f1o 6551  df-fv 6552  df-1st 7975  df-2nd 7976  df-en 8940  df-dom 8941
This theorem is referenced by:  uniimadom  10539  unirnfdomd  10562  alephreg  10577  inar1  10770  2ndcctbss  22959  tx2ndc  23155  mbfimaopnlem  25172
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