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| Mirrors > Home > MPE Home > Th. List > uniimadomf | Structured version Visualization version GIF version | ||
| Description: An upper bound for the cardinality of the union of an image. Theorem 10.48 of [TakeutiZaring] p. 99. This version of uniimadom 10552 uses a bound-variable hypothesis in place of a distinct variable condition. (Contributed by NM, 26-Mar-2006.) |
| Ref | Expression |
|---|---|
| uniimadomf.1 | ⊢ Ⅎ𝑥𝐹 |
| uniimadomf.2 | ⊢ 𝐴 ∈ V |
| uniimadomf.3 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| uniimadomf | ⊢ ((Fun 𝐹 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ≼ 𝐵) → ∪ (𝐹 “ 𝐴) ≼ (𝐴 × 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv 1947 | . . 3 ⊢ Ⅎ𝑧(𝐹‘𝑥) ≼ 𝐵 | |
| 2 | uniimadomf.1 | . . . . 5 ⊢ Ⅎ𝑥𝐹 | |
| 3 | nfcv 2922 | . . . . 5 ⊢ Ⅎ𝑥𝑧 | |
| 4 | 2, 3 | nffv 6888 | . . . 4 ⊢ Ⅎ𝑥(𝐹‘𝑧) |
| 5 | nfcv 2922 | . . . 4 ⊢ Ⅎ𝑥 ≼ | |
| 6 | nfcv 2922 | . . . 4 ⊢ Ⅎ𝑥𝐵 | |
| 7 | 4, 5, 6 | nfbr 5152 | . . 3 ⊢ Ⅎ𝑥(𝐹‘𝑧) ≼ 𝐵 |
| 8 | fveq2 6878 | . . . 4 ⊢ (𝑥 = 𝑧 → (𝐹‘𝑥) = (𝐹‘𝑧)) | |
| 9 | 8 | breq1d 5113 | . . 3 ⊢ (𝑥 = 𝑧 → ((𝐹‘𝑥) ≼ 𝐵 ↔ (𝐹‘𝑧) ≼ 𝐵)) |
| 10 | 1, 7, 9 | cbvralw 3304 | . 2 ⊢ (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ≼ 𝐵 ↔ ∀𝑧 ∈ 𝐴 (𝐹‘𝑧) ≼ 𝐵) |
| 11 | uniimadomf.2 | . . 3 ⊢ 𝐴 ∈ V | |
| 12 | uniimadomf.3 | . . 3 ⊢ 𝐵 ∈ V | |
| 13 | 11, 12 | uniimadom 10552 | . 2 ⊢ ((Fun 𝐹 ∧ ∀𝑧 ∈ 𝐴 (𝐹‘𝑧) ≼ 𝐵) → ∪ (𝐹 “ 𝐴) ≼ (𝐴 × 𝐵)) |
| 14 | 10, 13 | sylan2b 606 | 1 ⊢ ((Fun 𝐹 ∧ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ≼ 𝐵) → ∪ (𝐹 “ 𝐴) ≼ (𝐴 × 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 Ⅎwnfc 2907 ∀wral 3076 Vcvv 3450 ∪ cuni 4867 class class class wbr 5103 × cxp 5653 “ cima 5658 Fun wfun 6527 ‘cfv 6533 ≼ cdom 8950 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-ac2 10465 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-er 8696 df-map 8828 df-en 8953 df-dom 8954 df-card 9944 df-acn 9947 df-ac 10119 |
| This theorem is used by: (None) |
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