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| Mirrors > Home > MPE Home > Th. List > xpdom1g | Structured version Visualization version GIF version | ||
| Description: Dominance law for Cartesian product. Theorem 6L(c) of [Enderton] p. 149. (Contributed by NM, 25-Mar-2006.) (Revised by Mario Carneiro, 26-Apr-2015.) |
| Ref | Expression |
|---|---|
| xpdom1g | ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reldom 8927 | . . . 4 ⊢ Rel ≼ | |
| 2 | 1 | brrelex1i 5697 | . . 3 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ∈ V) |
| 3 | xpcomeng 9038 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐴 × 𝐶) ≈ (𝐶 × 𝐴)) | |
| 4 | 3 | ancoms 458 | . . 3 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ∈ V) → (𝐴 × 𝐶) ≈ (𝐶 × 𝐴)) |
| 5 | 2, 4 | sylan2 593 | . 2 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐴 × 𝐶) ≈ (𝐶 × 𝐴)) |
| 6 | xpdom2g 9042 | . . 3 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐶 × 𝐴) ≼ (𝐶 × 𝐵)) | |
| 7 | 1 | brrelex2i 5698 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐵 ∈ V) |
| 8 | xpcomeng 9038 | . . . 4 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐵 ∈ V) → (𝐶 × 𝐵) ≈ (𝐵 × 𝐶)) | |
| 9 | 7, 8 | sylan2 593 | . . 3 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐶 × 𝐵) ≈ (𝐵 × 𝐶)) |
| 10 | domentr 8987 | . . 3 ⊢ (((𝐶 × 𝐴) ≼ (𝐶 × 𝐵) ∧ (𝐶 × 𝐵) ≈ (𝐵 × 𝐶)) → (𝐶 × 𝐴) ≼ (𝐵 × 𝐶)) | |
| 11 | 6, 9, 10 | syl2anc 584 | . 2 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐶 × 𝐴) ≼ (𝐵 × 𝐶)) |
| 12 | endomtr 8986 | . 2 ⊢ (((𝐴 × 𝐶) ≈ (𝐶 × 𝐴) ∧ (𝐶 × 𝐴) ≼ (𝐵 × 𝐶)) → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶)) | |
| 13 | 5, 11, 12 | syl2anc 584 | 1 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2109 Vcvv 3450 class class class wbr 5110 × cxp 5639 ≈ cen 8918 ≼ cdom 8919 |
| 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-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 |
| 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-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-mpt 5192 df-id 5536 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-1st 7971 df-2nd 7972 df-en 8922 df-dom 8923 |
| This theorem is referenced by: xpdom1 9045 xpen 9110 xpct 9976 infpwfien 10022 infdjuabs 10165 fin56 10353 fnct 10497 iunctb 10534 canthp1lem1 10612 pwdjundom 10627 gchxpidm 10629 |
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