Theorem posref 18375

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 ∧ 𝑋 ∈ 𝐵) → 𝑋 ≤ 𝑋)

Proof of Theorem posref

Step	Hyp	Ref	Expression
1		posprs 18373	. 2 ⊢ (𝐾 ∈ Poset → 𝐾 ∈ Proset )
2		posi.b	. . 3 ⊢ 𝐵 = (Base‘𝐾)
3		posi.l	. . 3 ⊢ ≤ = (le‘𝐾)
4	2, 3	prsref 18355	. 2 ⊢ ((𝐾 ∈ Proset ∧ 𝑋 ∈ 𝐵) → 𝑋 ≤ 𝑋)
5	1, 4	sylan 591	1 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵) → 𝑋 ≤ 𝑋)

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1570   ∈ wcel 2143   class class class wbr 5110  ‘cfv 6538  Basecbs 17270  lecple 17318   Proset cproset 18349  Posetcpo 18364

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-ext 2735  ax-nul 5270

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-clab 2742  df-cleq 2755  df-clel 2838  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-sbc 3746  df-dif 3909  df-un 3911  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-iota 6494  df-fv 6546  df-proset 18351  df-poset 18370

This theorem is referenced by:  posasymb  18376  odupos  18383  pleval2  18392  pltval3  18394  pospo  18400  lublecllem  18415  latref  18498  omndmul2  20204  omndmul  20206  gsumle  20216  archirngz  33487  cvrnbtwn2  40027  cvrnbtwn3  40028  cvrnbtwn4  40031  cvrcmp  40035  llncmp  40274  lplncmp  40314  lvolcmp  40369  lubprlem  49717  posjidm  49727  posmidm  49728