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Theorem ple1 18500
Description: Any element is less than or equal to a poset's upper bound (if defined). (Contributed by NM, 22-Oct-2011.) (Revised by NM, 13-Sep-2018.)
Hypotheses
Ref Expression
ple1.b 𝐵 = (Base‘𝐾)
ple1.u 𝑈 = (lub‘𝐾)
ple1.l = (le‘𝐾)
ple1.1 1 = (1.‘𝐾)
ple1.k (𝜑𝐾𝑉)
ple1.x (𝜑𝑋𝐵)
ple1.d (𝜑𝐵 ∈ dom 𝑈)
Assertion
Ref Expression
ple1 (𝜑𝑋 1 )

Proof of Theorem ple1
StepHypRef Expression
1 ple1.b . . 3 𝐵 = (Base‘𝐾)
2 ple1.l . . 3 = (le‘𝐾)
3 ple1.u . . 3 𝑈 = (lub‘𝐾)
4 ple1.k . . 3 (𝜑𝐾𝑉)
5 ple1.d . . 3 (𝜑𝐵 ∈ dom 𝑈)
6 ple1.x . . 3 (𝜑𝑋𝐵)
71, 2, 3, 4, 5, 6luble 18429 . 2 (𝜑𝑋 (𝑈𝐵))
8 ple1.1 . . . 4 1 = (1.‘𝐾)
91, 3, 8p1val 18498 . . 3 (𝐾𝑉1 = (𝑈𝐵))
104, 9syl 17 . 2 (𝜑1 = (𝑈𝐵))
117, 10breqtrrd 5194 1 (𝜑𝑋 1 )
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1537  wcel 2108   class class class wbr 5166  dom cdm 5700  cfv 6573  Basecbs 17258  lecple 17318  lubclub 18379  1.cp1 18494
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-rep 5303  ax-sep 5317  ax-nul 5324  ax-pow 5383  ax-pr 5447
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-rmo 3388  df-reu 3389  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-iun 5017  df-br 5167  df-opab 5229  df-mpt 5250  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580  df-fv 6581  df-riota 7404  df-lub 18416  df-p1 18496
This theorem is referenced by:  ople1  39147  lhp2lt  39958
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