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Mirrors > Home > MPE Home > Th. List > iundom | Structured version Visualization version GIF version |
Description: An upper bound for the cardinality of an indexed union. 𝐶 depends on 𝑥 and should be thought of as 𝐶(𝑥). (Contributed by NM, 26-Mar-2006.) |
Ref | Expression |
---|---|
iundom | ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ≼ (𝐴 × 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2610 | . 2 ⊢ ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) = ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) | |
2 | simpl 472 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → 𝐴 ∈ 𝑉) | |
3 | ovex 6577 | . . . . . 6 ⊢ (𝐵 ↑𝑚 𝐶) ∈ V | |
4 | 3 | rgenw 2908 | . . . . 5 ⊢ ∀𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ V |
5 | iunexg 7035 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ V) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ V) | |
6 | 2, 4, 5 | sylancl 693 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ V) |
7 | numth3 9175 | . . . 4 ⊢ (∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ V → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ dom card) | |
8 | 6, 7 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ dom card) |
9 | numacn 8755 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ dom card → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ AC 𝐴)) | |
10 | 2, 8, 9 | sylc 63 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑𝑚 𝐶) ∈ AC 𝐴) |
11 | simpr 476 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) | |
12 | reldom 7847 | . . . . . 6 ⊢ Rel ≼ | |
13 | 12 | brrelexi 5082 | . . . . 5 ⊢ (𝐶 ≼ 𝐵 → 𝐶 ∈ V) |
14 | 13 | ralimi 2936 | . . . 4 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵 → ∀𝑥 ∈ 𝐴 𝐶 ∈ V) |
15 | iunexg 7035 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ∈ V) → ∪ 𝑥 ∈ 𝐴 𝐶 ∈ V) | |
16 | 14, 15 | sylan2 490 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ∈ V) |
17 | 1, 10, 11 | iundom2g 9241 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) ≼ (𝐴 × 𝐵)) |
18 | 12 | brrelex2i 5083 | . . . 4 ⊢ (∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) ≼ (𝐴 × 𝐵) → (𝐴 × 𝐵) ∈ V) |
19 | numth3 9175 | . . . 4 ⊢ ((𝐴 × 𝐵) ∈ V → (𝐴 × 𝐵) ∈ dom card) | |
20 | 17, 18, 19 | 3syl 18 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → (𝐴 × 𝐵) ∈ dom card) |
21 | numacn 8755 | . . 3 ⊢ (∪ 𝑥 ∈ 𝐴 𝐶 ∈ V → ((𝐴 × 𝐵) ∈ dom card → (𝐴 × 𝐵) ∈ AC ∪ 𝑥 ∈ 𝐴 𝐶)) | |
22 | 16, 20, 21 | sylc 63 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → (𝐴 × 𝐵) ∈ AC ∪ 𝑥 ∈ 𝐴 𝐶) |
23 | 1, 10, 11, 22 | iundomg 9242 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ≼ (𝐴 × 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∈ wcel 1977 ∀wral 2896 Vcvv 3173 {csn 4125 ∪ ciun 4455 class class class wbr 4583 × cxp 5036 dom cdm 5038 (class class class)co 6549 ↑𝑚 cmap 7744 ≼ cdom 7839 cardccrd 8644 AC wacn 8647 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-ac2 9168 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-er 7629 df-map 7746 df-en 7842 df-dom 7843 df-card 8648 df-acn 8651 df-ac 8822 |
This theorem is referenced by: unidom 9244 alephreg 9283 inar1 9476 |
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