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Theorem sucdom 9156
Description: Strict dominance of a set over a natural number is the same as dominance over its successor. (Contributed by Mario Carneiro, 12-Jan-2013.) Avoid ax-pow 5312. (Revised by BTernaryTau, 4-Dec-2024.) (Proof shortened by BJ, 11-Jan-2025.)
Assertion
Ref Expression
sucdom (𝐴 ∈ ω → (𝐴𝐵 ↔ suc 𝐴𝐵))

Proof of Theorem sucdom
StepHypRef Expression
1 sucdom2 9139 . 2 (𝐴𝐵 → suc 𝐴𝐵)
2 nnfi 9104 . . 3 (𝐴 ∈ ω → 𝐴 ∈ Fin)
3 php4 9146 . . 3 (𝐴 ∈ ω → 𝐴 ≺ suc 𝐴)
4 sdomdomtrfi 9137 . . . 4 ((𝐴 ∈ Fin ∧ 𝐴 ≺ suc 𝐴 ∧ suc 𝐴𝐵) → 𝐴𝐵)
543expia 1122 . . 3 ((𝐴 ∈ Fin ∧ 𝐴 ≺ suc 𝐴) → (suc 𝐴𝐵𝐴𝐵))
62, 3, 5syl2anc 585 . 2 (𝐴 ∈ ω → (suc 𝐴𝐵𝐴𝐵))
71, 6impbid2 226 1 (𝐴 ∈ ω → (𝐴𝐵 ↔ suc 𝐴𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wcel 2114   class class class wbr 5100  suc csuc 6327  ωcom 7818  cdom 8893  csdm 8894  Fincfn 8895
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5243  ax-nul 5253  ax-pr 5379  ax-un 7690
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5527  df-eprel 5532  df-po 5540  df-so 5541  df-fr 5585  df-we 5587  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-ord 6328  df-on 6329  df-lim 6330  df-suc 6331  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-om 7819  df-1o 8407  df-en 8896  df-dom 8897  df-sdom 8898  df-fin 8899
This theorem is referenced by:  0sdom1domALT  9159  harsucnn  9922  isnzr2  20463
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