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Theorem fict 7026
Description: A finite set is dominated by ω. Also see finct 7279. (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.
StepHypRef Expression
1 isfi 6910 . . 3 (𝐴 ∈ Fin ↔ ∃𝑛 ∈ ω 𝐴𝑛)
21biimpi 120 . 2 (𝐴 ∈ Fin → ∃𝑛 ∈ ω 𝐴𝑛)
3 simprr 531 . . 3 ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴𝑛)) → 𝐴𝑛)
4 omex 4684 . . . . 5 ω ∈ V
5 ordom 4698 . . . . . 6 Ord ω
6 ordelss 4469 . . . . . 6 ((Ord ω ∧ 𝑛 ∈ ω) → 𝑛 ⊆ ω)
75, 6mpan 424 . . . . 5 (𝑛 ∈ ω → 𝑛 ⊆ ω)
8 ssdomg 6928 . . . . 5 (ω ∈ V → (𝑛 ⊆ ω → 𝑛 ≼ ω))
94, 7, 8mpsyl 65 . . . 4 (𝑛 ∈ ω → 𝑛 ≼ ω)
109ad2antrl 490 . . 3 ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴𝑛)) → 𝑛 ≼ ω)
11 endomtr 6940 . . 3 ((𝐴𝑛𝑛 ≼ ω) → 𝐴 ≼ ω)
123, 10, 11syl2anc 411 . 2 ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴𝑛)) → 𝐴 ≼ ω)
132, 12rexlimddv 2653 1 (𝐴 ∈ Fin → 𝐴 ≼ ω)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wcel 2200  wrex 2509  Vcvv 2799  wss 3197   class class class wbr 4082  Ord word 4452  ωcom 4681  cen 6883  cdom 6884  Fincfn 6885
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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-nul 4209  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-iinf 4679
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-br 4083  df-opab 4145  df-tr 4182  df-id 4383  df-iord 4456  df-suc 4461  df-iom 4682  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-ima 4731  df-fun 5319  df-fn 5320  df-f 5321  df-f1 5322  df-fo 5323  df-f1o 5324  df-en 6886  df-dom 6887  df-fin 6888
This theorem is referenced by: (None)
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