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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 2738 | . 2 ⊢ ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) = ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) | |
2 | simpl 482 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → 𝐴 ∈ 𝑉) | |
3 | ovex 7288 | . . . . . 6 ⊢ (𝐵 ↑m 𝐶) ∈ V | |
4 | 3 | rgenw 3075 | . . . . 5 ⊢ ∀𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V |
5 | iunexg 7779 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V) | |
6 | 2, 4, 5 | sylancl 585 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V) |
7 | numth3 10157 | . . . 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 9736 | . . 3 ⊢ (𝐴 ∈ 𝑉 → (∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ dom card → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ AC 𝐴)) | |
10 | 2, 8, 9 | sylc 65 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ AC 𝐴) |
11 | simpr 484 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) | |
12 | reldom 8697 | . . . . . 6 ⊢ Rel ≼ | |
13 | 12 | brrelex1i 5634 | . . . . 5 ⊢ (𝐶 ≼ 𝐵 → 𝐶 ∈ V) |
14 | 13 | ralimi 3086 | . . . 4 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵 → ∀𝑥 ∈ 𝐴 𝐶 ∈ V) |
15 | iunexg 7779 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ∈ V) → ∪ 𝑥 ∈ 𝐴 𝐶 ∈ V) | |
16 | 14, 15 | sylan2 592 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ∈ V) |
17 | 1, 10, 11 | iundom2g 10227 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) ≼ (𝐴 × 𝐵)) |
18 | 12 | brrelex2i 5635 | . . . 4 ⊢ (∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) ≼ (𝐴 × 𝐵) → (𝐴 × 𝐵) ∈ V) |
19 | numth3 10157 | . . . 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 9736 | . . 3 ⊢ (∪ 𝑥 ∈ 𝐴 𝐶 ∈ V → ((𝐴 × 𝐵) ∈ dom card → (𝐴 × 𝐵) ∈ AC ∪ 𝑥 ∈ 𝐴 𝐶)) | |
22 | 16, 20, 21 | sylc 65 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → (𝐴 × 𝐵) ∈ AC ∪ 𝑥 ∈ 𝐴 𝐶) |
23 | 1, 10, 11, 22 | iundomg 10228 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ≼ (𝐴 × 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2108 ∀wral 3063 Vcvv 3422 {csn 4558 ∪ ciun 4921 class class class wbr 5070 × cxp 5578 dom cdm 5580 (class class class)co 7255 ↑m cmap 8573 ≼ cdom 8689 cardccrd 9624 AC wacn 9627 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-ac2 10150 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 df-card 9628 df-acn 9631 df-ac 9803 |
This theorem is referenced by: unidom 10230 alephreg 10269 inar1 10462 |
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