Theorem poirr 5487

Description: A partial order relation is irreflexive. (Contributed by NM, 27-Mar-1997.)

Assertion

Ref	Expression
poirr	⊢ ((𝑅 Po 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵)

Proof of Theorem poirr

Step	Hyp	Ref	Expression
1		df-3an 1085	. . 3 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ↔ ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ∧ 𝐵 ∈ 𝐴))
2		anabs1 660	. . 3 ⊢ (((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ∧ 𝐵 ∈ 𝐴) ↔ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴))
3		anidm 567	. . 3 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ↔ 𝐵 ∈ 𝐴)
4	1, 2, 3	3bitrri 300	. 2 ⊢ (𝐵 ∈ 𝐴 ↔ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴))
5		pocl 5483	. . . 4 ⊢ (𝑅 Po 𝐴 → ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐵 ∧ 𝐵𝑅𝐵) → 𝐵𝑅𝐵))))
6	5	imp 409	. . 3 ⊢ ((𝑅 Po 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴)) → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐵 ∧ 𝐵𝑅𝐵) → 𝐵𝑅𝐵)))
7	6	simpld 497	. 2 ⊢ ((𝑅 Po 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴)) → ¬ 𝐵𝑅𝐵)
8	4, 7	sylan2b 595	1 ⊢ ((𝑅 Po 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 398   ∧ w3a 1083   ∈ wcel 2114   class class class wbr 5068   Po wpo 5474

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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ral 3145  df-rab 3149  df-v 3498  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-br 5069  df-po 5476

This theorem is referenced by:  po2nr  5489  po2ne  5491  pofun  5493  sonr  5498  poirr2  5986  predpoirr  6178  soisoi  7083  poxp  7824  swoer  8321  frfi  8765  wemappo  9015  zorn2lem3  9922  ex-po  28216  pocnv  33001  poseq  33097  ipo0  40788