Theorem fict 6691

Description: A finite set is dominated by ω. Also see finct 6915. (Contributed by Thierry Arnoux, 27-Mar-2018.)

Assertion

Ref	Expression
fict	⊢ (𝐴 ∈ Fin → 𝐴 ≼ ω)

Proof of Theorem fict

Dummy variable 𝑛 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		isfi 6585	. . 3 ⊢ (𝐴 ∈ Fin ↔ ∃𝑛 ∈ ω 𝐴 ≈ 𝑛)
2	1	biimpi 119	. 2 ⊢ (𝐴 ∈ Fin → ∃𝑛 ∈ ω 𝐴 ≈ 𝑛)
3		simprr 502	. . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝐴 ≈ 𝑛)
4		omex 4445	. . . . 5 ⊢ ω ∈ V
5		ordom 4458	. . . . . 6 ⊢ Ord ω
6		ordelss 4239	. . . . . 6 ⊢ ((Ord ω ∧ 𝑛 ∈ ω) → 𝑛 ⊆ ω)
7	5, 6	mpan 418	. . . . 5 ⊢ (𝑛 ∈ ω → 𝑛 ⊆ ω)
8		ssdomg 6602	. . . . 5 ⊢ (ω ∈ V → (𝑛 ⊆ ω → 𝑛 ≼ ω))
9	4, 7, 8	mpsyl 65	. . . 4 ⊢ (𝑛 ∈ ω → 𝑛 ≼ ω)
10	9	ad2antrl 477	. . 3 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝑛 ≼ ω)
11		endomtr 6614	. . 3 ⊢ ((𝐴 ≈ 𝑛 ∧ 𝑛 ≼ ω) → 𝐴 ≼ ω)
12	3, 10, 11	syl2anc 406	. 2 ⊢ ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴 ≈ 𝑛)) → 𝐴 ≼ ω)
13	2, 12	rexlimddv 2513	1 ⊢ (𝐴 ∈ Fin → 𝐴 ≼ ω)

Syntax hints:   → wi 4   ∧ wa 103   ∈ wcel 1448  ∃wrex 2376  Vcvv 2641   ⊆ wss 3021   class class class wbr 3875  Ord word 4222  ωcom 4442   ≈ cen 6562   ≼ cdom 6563  Fincfn 6564

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 584  ax-in2 585  ax-io 671  ax-5 1391  ax-7 1392  ax-gen 1393  ax-ie1 1437  ax-ie2 1438  ax-8 1450  ax-10 1451  ax-11 1452  ax-i12 1453  ax-bndl 1454  ax-4 1455  ax-13 1459  ax-14 1460  ax-17 1474  ax-i9 1478  ax-ial 1482  ax-i5r 1483  ax-ext 2082  ax-sep 3986  ax-nul 3994  ax-pow 4038  ax-pr 4069  ax-un 4293  ax-iinf 4440

This theorem depends on definitions:  df-bi 116  df-3an 932  df-tru 1302  df-nf 1405  df-sb 1704  df-eu 1963  df-mo 1964  df-clab 2087  df-cleq 2093  df-clel 2096  df-nfc 2229  df-ral 2380  df-rex 2381  df-v 2643  df-dif 3023  df-un 3025  df-in 3027  df-ss 3034  df-nul 3311  df-pw 3459  df-sn 3480  df-pr 3481  df-op 3483  df-uni 3684  df-int 3719  df-br 3876  df-opab 3930  df-tr 3967  df-id 4153  df-iord 4226  df-suc 4231  df-iom 4443  df-xp 4483  df-rel 4484  df-cnv 4485  df-co 4486  df-dm 4487  df-rn 4488  df-res 4489  df-ima 4490  df-fun 5061  df-fn 5062  df-f 5063  df-f1 5064  df-fo 5065  df-f1o 5066  df-en 6565  df-dom 6566  df-fin 6567

This theorem is referenced by: (None)