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Theorem fict 6858
Description: A finite set is dominated by ω. Also see finct 7105. (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 6751 . . 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 4586 . . . . 5 ω ∈ V
5 ordom 4600 . . . . . 6 Ord ω
6 ordelss 4373 . . . . . 6 ((Ord ω ∧ 𝑛 ∈ ω) → 𝑛 ⊆ ω)
75, 6mpan 424 . . . . 5 (𝑛 ∈ ω → 𝑛 ⊆ ω)
8 ssdomg 6768 . . . . 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 6780 . . 3 ((𝐴𝑛𝑛 ≼ ω) → 𝐴 ≼ ω)
123, 10, 11syl2anc 411 . 2 ((𝐴 ∈ Fin ∧ (𝑛 ∈ ω ∧ 𝐴𝑛)) → 𝐴 ≼ ω)
132, 12rexlimddv 2597 1 (𝐴 ∈ Fin → 𝐴 ≼ ω)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wcel 2146  wrex 2454  Vcvv 2735  wss 3127   class class class wbr 3998  Ord word 4356  ωcom 4583  cen 6728  cdom 6729  Fincfn 6730
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 614  ax-in2 615  ax-io 709  ax-5 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-13 2148  ax-14 2149  ax-ext 2157  ax-sep 4116  ax-nul 4124  ax-pow 4169  ax-pr 4203  ax-un 4427  ax-iinf 4581
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1459  df-sb 1761  df-eu 2027  df-mo 2028  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-ral 2458  df-rex 2459  df-v 2737  df-dif 3129  df-un 3131  df-in 3133  df-ss 3140  df-nul 3421  df-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-int 3841  df-br 3999  df-opab 4060  df-tr 4097  df-id 4287  df-iord 4360  df-suc 4365  df-iom 4584  df-xp 4626  df-rel 4627  df-cnv 4628  df-co 4629  df-dm 4630  df-rn 4631  df-res 4632  df-ima 4633  df-fun 5210  df-fn 5211  df-f 5212  df-f1 5213  df-fo 5214  df-f1o 5215  df-en 6731  df-dom 6732  df-fin 6733
This theorem is referenced by: (None)
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