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Theorem posref 16774
Description: A poset ordering is reflexive. (Contributed by NM, 11-Sep-2011.) (Proof shortened by OpenAI, 25-Mar-2020.)
Hypotheses
Ref Expression
posi.b 𝐵 = (Base‘𝐾)
posi.l = (le‘𝐾)
Assertion
Ref Expression
posref ((𝐾 ∈ Poset ∧ 𝑋𝐵) → 𝑋 𝑋)

Proof of Theorem posref
StepHypRef Expression
1 posprs 16772 . 2 (𝐾 ∈ Poset → 𝐾 ∈ Preset )
2 posi.b . . 3 𝐵 = (Base‘𝐾)
3 posi.l . . 3 = (le‘𝐾)
42, 3prsref 16755 . 2 ((𝐾 ∈ Preset ∧ 𝑋𝐵) → 𝑋 𝑋)
51, 4sylan 487 1 ((𝐾 ∈ Poset ∧ 𝑋𝐵) → 𝑋 𝑋)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 383   = wceq 1475  wcel 1977   class class class wbr 4583  cfv 5804  Basecbs 15695  lecple 15775   Preset cpreset 16749  Posetcpo 16763
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-nul 4717
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-iota 5768  df-fv 5812  df-preset 16751  df-poset 16769
This theorem is referenced by:  posasymb  16775  pleval2  16788  pltval3  16790  pospo  16796  lublecllem  16811  latref  16876  odupos  16958  omndmul2  29043  omndmul  29045  archirngz  29074  gsumle  29110  cvrnbtwn2  33580  cvrnbtwn3  33581  cvrnbtwn4  33584  cvrcmp  33588  llncmp  33826  lplncmp  33866  lvolcmp  33921
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