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Mirrors > Home > ILE Home > Th. List > fict | GIF version |
Description: A finite set is dominated by ω. Also see finct 6994. (Contributed by Thierry Arnoux, 27-Mar-2018.) |
Ref | Expression |
---|---|
fict | ⊢ (𝐴 ∈ Fin → 𝐴 ≼ ω) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isfi 6648 | . . 3 ⊢ (𝐴 ∈ Fin ↔ ∃𝑛 ∈ ω 𝐴 ≈ 𝑛) | |
2 | 1 | biimpi 119 | . 2 ⊢ (𝐴 ∈ Fin → ∃𝑛 ∈ ω 𝐴 ≈ 𝑛) |
3 | simprr 521 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝐴 ≈ 𝑛) | |
4 | omex 4502 | . . . . 5 ⊢ ω ∈ V | |
5 | ordom 4515 | . . . . . 6 ⊢ Ord ω | |
6 | ordelss 4296 | . . . . . 6 ⊢ ((Ord ω ∧ 𝑛 ∈ ω) → 𝑛 ⊆ ω) | |
7 | 5, 6 | mpan 420 | . . . . 5 ⊢ (𝑛 ∈ ω → 𝑛 ⊆ ω) |
8 | ssdomg 6665 | . . . . 5 ⊢ (ω ∈ V → (𝑛 ⊆ ω → 𝑛 ≼ ω)) | |
9 | 4, 7, 8 | mpsyl 65 | . . . 4 ⊢ (𝑛 ∈ ω → 𝑛 ≼ ω) |
10 | 9 | ad2antrl 481 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝑛 ≼ ω) |
11 | endomtr 6677 | . . 3 ⊢ ((𝐴 ≈ 𝑛 ∧ 𝑛 ≼ ω) → 𝐴 ≼ ω) | |
12 | 3, 10, 11 | syl2anc 408 | . 2 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝐴 ≼ ω) |
13 | 2, 12 | rexlimddv 2552 | 1 ⊢ (𝐴 ∈ Fin → 𝐴 ≼ ω) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∈ wcel 1480 ∃wrex 2415 Vcvv 2681 ⊆ wss 3066 class class class wbr 3924 Ord word 4279 ωcom 4499 ≈ cen 6625 ≼ cdom 6626 Fincfn 6627 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-nul 4049 ax-pow 4093 ax-pr 4126 ax-un 4350 ax-iinf 4497 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-v 2683 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-nul 3359 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-int 3767 df-br 3925 df-opab 3985 df-tr 4022 df-id 4210 df-iord 4283 df-suc 4288 df-iom 4500 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-res 4546 df-ima 4547 df-fun 5120 df-fn 5121 df-f 5122 df-f1 5123 df-fo 5124 df-f1o 5125 df-en 6628 df-dom 6629 df-fin 6630 |
This theorem is referenced by: (None) |
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