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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 483 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → 𝐴 ∈ 𝑉) | |
3 | ovex 7308 | . . . . . 6 ⊢ (𝐵 ↑m 𝐶) ∈ V | |
4 | 3 | rgenw 3076 | . . . . 5 ⊢ ∀𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V |
5 | iunexg 7806 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V) | |
6 | 2, 4, 5 | sylancl 586 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 (𝐵 ↑m 𝐶) ∈ V) |
7 | numth3 10226 | . . . 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 9805 | . . 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 485 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) | |
12 | reldom 8739 | . . . . . 6 ⊢ Rel ≼ | |
13 | 12 | brrelex1i 5643 | . . . . 5 ⊢ (𝐶 ≼ 𝐵 → 𝐶 ∈ V) |
14 | 13 | ralimi 3087 | . . . 4 ⊢ (∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵 → ∀𝑥 ∈ 𝐴 𝐶 ∈ V) |
15 | iunexg 7806 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ∈ V) → ∪ 𝑥 ∈ 𝐴 𝐶 ∈ V) | |
16 | 14, 15 | sylan2 593 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ∈ V) |
17 | 1, 10, 11 | iundom2g 10296 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) ≼ (𝐴 × 𝐵)) |
18 | 12 | brrelex2i 5644 | . . . 4 ⊢ (∪ 𝑥 ∈ 𝐴 ({𝑥} × 𝐶) ≼ (𝐴 × 𝐵) → (𝐴 × 𝐵) ∈ V) |
19 | numth3 10226 | . . . 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 9805 | . . 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 10297 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝐶 ≼ 𝐵) → ∪ 𝑥 ∈ 𝐴 𝐶 ≼ (𝐴 × 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2106 ∀wral 3064 Vcvv 3432 {csn 4561 ∪ ciun 4924 class class class wbr 5074 × cxp 5587 dom cdm 5589 (class class class)co 7275 ↑m cmap 8615 ≼ cdom 8731 cardccrd 9693 AC wacn 9696 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-ac2 10219 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-card 9697 df-acn 9700 df-ac 9872 |
This theorem is referenced by: unidom 10299 alephreg 10338 inar1 10531 |
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