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Theorem ple1 18148
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 18077 . 2 (𝜑𝑋 (𝑈𝐵))
8 ple1.1 . . . 4 1 = (1.‘𝐾)
91, 3, 8p1val 18146 . . 3 (𝐾𝑉1 = (𝑈𝐵))
104, 9syl 17 . 2 (𝜑1 = (𝑈𝐵))
117, 10breqtrrd 5102 1 (𝜑𝑋 1 )
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1539  wcel 2106   class class class wbr 5074  dom cdm 5589  cfv 6433  Basecbs 16912  lecple 16969  lubclub 18027  1.cp1 18142
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-riota 7232  df-lub 18064  df-p1 18144
This theorem is referenced by:  ople1  37205  lhp2lt  38015
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