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| Mirrors > Home > ILE Home > Th. List > fict | GIF version | ||
| Description: A finite set is dominated by ω. Also see finct 7407. (Contributed by Thierry Arnoux, 27-Mar-2018.) |
| Ref | Expression |
|---|---|
| fict | ⊢ (𝐴 ∈ Fin → 𝐴 ≼ ω) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isfi 7000 | . . 3 ⊢ (𝐴 ∈ Fin ↔ ∃𝑛 ∈ ω 𝐴 ≈ 𝑛) | |
| 2 | 1 | biimpi 120 | . 2 ⊢ (𝐴 ∈ Fin → ∃𝑛 ∈ ω 𝐴 ≈ 𝑛) |
| 3 | simprr 533 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝐴 ≈ 𝑛) | |
| 4 | omex 4715 | . . . . 5 ⊢ ω ∈ V | |
| 5 | ordom 4729 | . . . . . 6 ⊢ Ord ω | |
| 6 | ordelss 4500 | . . . . . 6 ⊢ ((Ord ω ∧ 𝑛 ∈ ω) → 𝑛 ⊆ ω) | |
| 7 | 5, 6 | mpan 424 | . . . . 5 ⊢ (𝑛 ∈ ω → 𝑛 ⊆ ω) |
| 8 | ssdomg 7018 | . . . . 5 ⊢ (ω ∈ V → (𝑛 ⊆ ω → 𝑛 ≼ ω)) | |
| 9 | 4, 7, 8 | mpsyl 65 | . . . 4 ⊢ (𝑛 ∈ ω → 𝑛 ≼ ω) |
| 10 | 9 | ad2antrl 490 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝑛 ≼ ω) |
| 11 | endomtr 7030 | . . 3 ⊢ ((𝐴 ≈ 𝑛 ∧ 𝑛 ≼ ω) → 𝐴 ≼ ω) | |
| 12 | 3, 10, 11 | syl2anc 411 | . 2 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝐴 ≼ ω) |
| 13 | 2, 12 | rexlimddv 2665 | 1 ⊢ (𝐴 ∈ Fin → 𝐴 ≼ ω) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2203 ∃wrex 2521 Vcvv 2813 ⊆ wss 3211 class class class wbr 4109 Ord word 4483 ωcom 4712 ≈ cen 6973 ≼ cdom 6974 Fincfn 6975 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-nul 4236 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-iinf 4710 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2815 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-nul 3509 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-int 3950 df-br 4110 df-opab 4172 df-tr 4209 df-id 4414 df-iord 4487 df-suc 4492 df-iom 4713 df-xp 4755 df-rel 4756 df-cnv 4757 df-co 4758 df-dm 4759 df-rn 4760 df-res 4761 df-ima 4762 df-fun 5354 df-fn 5355 df-f 5356 df-f1 5357 df-fo 5358 df-f1o 5359 df-en 6976 df-dom 6977 df-fin 6978 |
| This theorem is referenced by: pw1ninf 16765 |
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