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Theorem sotrd 5589
Description: Transitivity law for strict orderings, deduction form. (Contributed by Scott Fenton, 24-Nov-2021.)
Hypotheses
Ref Expression
sotrd.1 (𝜑 → 𝑅 Or 𝐴)
sotrd.2 (𝜑 → 𝑋 ∈ 𝐴)
sotrd.3 (𝜑 → 𝑌 ∈ 𝐴)
sotrd.4 (𝜑 → 𝑍 ∈ 𝐴)
sotrd.5 (𝜑 → 𝑋𝑅𝑌)
sotrd.6 (𝜑 → 𝑌𝑅𝑍)
Assertion
Ref Expression
sotrd (𝜑 → 𝑋𝑅𝑍)

Proof of Theorem sotrd
StepHypRef Expression
1 sotrd.5 . 2 (𝜑 → 𝑋𝑅𝑌)
2 sotrd.6 . 2 (𝜑 → 𝑌𝑅𝑍)
3 sotrd.1 . . 3 (𝜑 → 𝑅 Or 𝐴)
4 sotrd.2 . . 3 (𝜑 → 𝑋 ∈ 𝐴)
5 sotrd.3 . . 3 (𝜑 → 𝑌 ∈ 𝐴)
6 sotrd.4 . . 3 (𝜑 → 𝑍 ∈ 𝐴)
7 sotr 5588 . . 3 ((𝑅 Or 𝐴 ∧ (𝑋 ∈ 𝐴 ∧ 𝑌 ∈ 𝐴 ∧ 𝑍 ∈ 𝐴)) → ((𝑋𝑅𝑌 ∧ 𝑌𝑅𝑍) → 𝑋𝑅𝑍))
83, 4, 5, 6, 7syl13anc 1400 . 2 (𝜑 → ((𝑋𝑅𝑌 ∧ 𝑌𝑅𝑍) → 𝑋𝑅𝑍))
91, 2, 8mp2and 712 1 (𝜑 → 𝑋𝑅𝑍)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∈ wcel 2147   class class class wbr 5106   Or wor 5562
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ral 3081  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-br 5107  df-po 5563  df-so 5564
This theorem is used by:  ormkglobd  48092
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