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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 703 1 (𝐴𝐵 → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wcel 2146  Vcvv 3457   class class class wbr 5111   × cxp 5661  cdom 8947
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2737  ax-sep 5259  ax-nul 5271  ax-pow 5338  ax-pr 5406  ax-un 7742
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3082  df-rex 3092  df-rab 3419  df-v 3459  df-sbc 3747  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4287  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4875  df-br 5112  df-opab 5176  df-mpt 5195  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-iota 6496  df-fun 6542  df-fn 6543  df-f 6544  df-f1 6545  df-fo 6546  df-f1o 6547  df-fv 6548  df-1st 7992  df-2nd 7993  df-en 8950  df-dom 8951
This theorem is used by:  uniimadom  10543  unirnfdomd  10567  alephreg  10582  inar1  10775  2ndcctbss  23663  tx2ndc  23859  mbfimaopnlem  25865
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