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| Mirrors > Home > MPE Home > Th. List > infsdomnn | Structured version Visualization version GIF version | ||
| Description: An infinite set strictly dominates a natural number. (Contributed by NM, 22-Nov-2004.) (Revised by Mario Carneiro, 27-Apr-2015.) Avoid ax-pow 5312. (Revised by BTernaryTau, 7-Jan-2025.) |
| Ref | Expression |
|---|---|
| infsdomnn | ⊢ ((ω ≼ 𝐴 ∧ 𝐵 ∈ ω) → 𝐵 ≺ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnfi 9104 | . . 3 ⊢ (𝐵 ∈ ω → 𝐵 ∈ Fin) | |
| 2 | 1 | adantl 481 | . 2 ⊢ ((ω ≼ 𝐴 ∧ 𝐵 ∈ ω) → 𝐵 ∈ Fin) |
| 3 | reldom 8901 | . . . 4 ⊢ Rel ≼ | |
| 4 | 3 | brrelex1i 5688 | . . 3 ⊢ (ω ≼ 𝐴 → ω ∈ V) |
| 5 | nnsdomg 9211 | . . 3 ⊢ ((ω ∈ V ∧ 𝐵 ∈ ω) → 𝐵 ≺ ω) | |
| 6 | 4, 5 | sylan 581 | . 2 ⊢ ((ω ≼ 𝐴 ∧ 𝐵 ∈ ω) → 𝐵 ≺ ω) |
| 7 | simpl 482 | . 2 ⊢ ((ω ≼ 𝐴 ∧ 𝐵 ∈ ω) → ω ≼ 𝐴) | |
| 8 | sdomdomtrfi 9137 | . 2 ⊢ ((𝐵 ∈ Fin ∧ 𝐵 ≺ ω ∧ ω ≼ 𝐴) → 𝐵 ≺ 𝐴) | |
| 9 | 2, 6, 7, 8 | syl3anc 1374 | 1 ⊢ ((ω ≼ 𝐴 ∧ 𝐵 ∈ ω) → 𝐵 ≺ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 Vcvv 3442 class class class wbr 5100 ωcom 7818 ≼ cdom 8893 ≺ csdm 8894 Fincfn 8895 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-om 7819 df-1o 8407 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 |
| This theorem is referenced by: infn0ALT 9215 |
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