Users' Mathboxes Mathbox for Richard Penner < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  safesnsupfiub Structured version   Visualization version   GIF version

Theorem safesnsupfiub 43523
Description: If 𝐵 is a finite subset of ordered class 𝐴, we can safely create a small subset with the same largest element and upper bound, if any. (Contributed by RP, 1-Sep-2024.)
Hypotheses
Ref Expression
safesnsupfiub.small (𝜑 → (𝑂 = ∅ ∨ 𝑂 = 1o))
safesnsupfiub.finite (𝜑𝐵 ∈ Fin)
safesnsupfiub.subset (𝜑𝐵𝐴)
safesnsupfiub.ordered (𝜑𝑅 Or 𝐴)
safesnsupfiub.ub (𝜑 → ∀𝑥𝐵𝑦𝐶 𝑥𝑅𝑦)
Assertion
Ref Expression
safesnsupfiub (𝜑 → ∀𝑥 ∈ if (𝑂𝐵, {sup(𝐵, 𝐴, 𝑅)}, 𝐵)∀𝑦𝐶 𝑥𝑅𝑦)
Distinct variable group:   𝜑,𝑥
Allowed substitution hints:   𝜑(𝑦)   𝐴(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝐶(𝑥,𝑦)   𝑅(𝑥,𝑦)   𝑂(𝑥,𝑦)

Proof of Theorem safesnsupfiub
StepHypRef Expression
1 safesnsupfiub.ub . 2 (𝜑 → ∀𝑥𝐵𝑦𝐶 𝑥𝑅𝑦)
2 safesnsupfiub.small . . . . . 6 (𝜑 → (𝑂 = ∅ ∨ 𝑂 = 1o))
3 safesnsupfiub.finite . . . . . 6 (𝜑𝐵 ∈ Fin)
4 safesnsupfiub.subset . . . . . 6 (𝜑𝐵𝐴)
5 safesnsupfiub.ordered . . . . . 6 (𝜑𝑅 Or 𝐴)
62, 3, 4, 5safesnsupfiss 43522 . . . . 5 (𝜑 → if(𝑂𝐵, {sup(𝐵, 𝐴, 𝑅)}, 𝐵) ⊆ 𝐵)
76sseld 3930 . . . 4 (𝜑 → (𝑥 ∈ if(𝑂𝐵, {sup(𝐵, 𝐴, 𝑅)}, 𝐵) → 𝑥𝐵))
87imim1d 82 . . 3 (𝜑 → ((𝑥𝐵 → ∀𝑦𝐶 𝑥𝑅𝑦) → (𝑥 ∈ if(𝑂𝐵, {sup(𝐵, 𝐴, 𝑅)}, 𝐵) → ∀𝑦𝐶 𝑥𝑅𝑦)))
98ralimdv2 3143 . 2 (𝜑 → (∀𝑥𝐵𝑦𝐶 𝑥𝑅𝑦 → ∀𝑥 ∈ if (𝑂𝐵, {sup(𝐵, 𝐴, 𝑅)}, 𝐵)∀𝑦𝐶 𝑥𝑅𝑦))
101, 9mpd 15 1 (𝜑 → ∀𝑥 ∈ if (𝑂𝐵, {sup(𝐵, 𝐴, 𝑅)}, 𝐵)∀𝑦𝐶 𝑥𝑅𝑦)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wo 847   = wceq 1541  wcel 2113  wral 3049  wss 3899  c0 4284  ifcif 4476  {csn 4577   class class class wbr 5095   Or wor 5528  1oc1o 8387  csdm 8877  Fincfn 8878  supcsup 9334
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-sep 5238  ax-nul 5248  ax-pow 5307  ax-pr 5374  ax-un 7677
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2883  df-ne 2931  df-ral 3050  df-rex 3059  df-rmo 3348  df-reu 3349  df-rab 3398  df-v 3440  df-sbc 3739  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-pss 3919  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4861  df-br 5096  df-opab 5158  df-tr 5203  df-id 5516  df-eprel 5521  df-po 5529  df-so 5530  df-fr 5574  df-we 5576  df-xp 5627  df-rel 5628  df-cnv 5629  df-co 5630  df-dm 5631  df-rn 5632  df-res 5633  df-ima 5634  df-ord 6317  df-on 6318  df-lim 6319  df-suc 6320  df-iota 6445  df-fun 6491  df-fn 6492  df-f 6493  df-f1 6494  df-fo 6495  df-f1o 6496  df-fv 6497  df-riota 7312  df-om 7806  df-1o 8394  df-er 8631  df-en 8879  df-dom 8880  df-sdom 8881  df-fin 8882  df-sup 9336
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator