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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 8889 | . . . 4 ⊢ Rel ≼ | |
| 2 | 1 | brrelex1i 5674 | . . 3 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ∈ V) |
| 3 | xpcomeng 8997 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐴 × 𝐶) ≈ (𝐶 × 𝐴)) | |
| 4 | 3 | ancoms 459 | . . 3 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ∈ V) → (𝐴 × 𝐶) ≈ (𝐶 × 𝐴)) |
| 5 | 2, 4 | sylan2 599 | . 2 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐴 × 𝐶) ≈ (𝐶 × 𝐴)) |
| 6 | xpdom2g 9001 | . . 3 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐶 × 𝐴) ≼ (𝐶 × 𝐵)) | |
| 7 | 1 | brrelex2i 5675 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐵 ∈ V) |
| 8 | xpcomeng 8997 | . . . 4 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐵 ∈ V) → (𝐶 × 𝐵) ≈ (𝐵 × 𝐶)) | |
| 9 | 7, 8 | sylan2 599 | . . 3 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐶 × 𝐵) ≈ (𝐵 × 𝐶)) |
| 10 | domentr 8950 | . . 3 ⊢ (((𝐶 × 𝐴) ≼ (𝐶 × 𝐵) ∧ (𝐶 × 𝐵) ≈ (𝐵 × 𝐶)) → (𝐶 × 𝐴) ≼ (𝐵 × 𝐶)) | |
| 11 | 6, 9, 10 | syl2anc 590 | . 2 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐶 × 𝐴) ≼ (𝐵 × 𝐶)) |
| 12 | endomtr 8949 | . 2 ⊢ (((𝐴 × 𝐶) ≈ (𝐶 × 𝐴) ∧ (𝐶 × 𝐴) ≼ (𝐵 × 𝐶)) → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶)) | |
| 13 | 5, 11, 12 | syl2anc 590 | 1 ⊢ ((𝐶 ∈ 𝑉 ∧ 𝐴 ≼ 𝐵) → (𝐴 × 𝐶) ≼ (𝐵 × 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2119 Vcvv 3431 class class class wbr 5072 × cxp 5616 ≈ cen 8880 ≼ cdom 8881 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-1st 7931 df-2nd 7932 df-en 8884 df-dom 8885 |
| This theorem is referenced by: xpdom1 9004 xpen 9068 xpct 9929 infpwfien 9975 infdjuabs 10118 fin56 10306 fnct 10450 iunctb 10488 canthp1lem1 10566 pwdjundom 10581 gchxpidm 10583 |
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