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Theorem fuco2eld 50650
Description: Equivalence of product functor. (Contributed by Zhi Wang, 29-Sep-2025.)
Hypotheses
Ref Expression
fuco2eld.w (𝜑 → 𝑊 = (𝑆 × 𝑅))
fuco2eld.u (𝜑 → 𝑈 = ⟨⟨𝐾, 𝐿⟩, ⟨𝐹, 𝐺⟩⟩)
fuco2eld.k (𝜑 → 𝐾𝑆𝐿)
fuco2eld.f (𝜑 → 𝐹𝑅𝐺)
Assertion
Ref Expression
fuco2eld (𝜑 → 𝑈 ∈ 𝑊)

Proof of Theorem fuco2eld
StepHypRef Expression
1 fuco2eld.k . . 3 (𝜑 → 𝐾𝑆𝐿)
2 fuco2eld.f . . 3 (𝜑 → 𝐹𝑅𝐺)
3 fuco2el 50649 . . 3 (⟨⟨𝐾, 𝐿⟩, ⟨𝐹, 𝐺⟩⟩ ∈ (𝑆 × 𝑅) ↔ (𝐾𝑆𝐿 ∧ 𝐹𝑅𝐺))
41, 2, 3sylanbrc 595 . 2 (𝜑 → ⟨⟨𝐾, 𝐿⟩, ⟨𝐹, 𝐺⟩⟩ ∈ (𝑆 × 𝑅))
5 fuco2eld.u . 2 (𝜑 → 𝑈 = ⟨⟨𝐾, 𝐿⟩, ⟨𝐹, 𝐺⟩⟩)
6 fuco2eld.w . 2 (𝜑 → 𝑊 = (𝑆 × 𝑅))
74, 5, 63eltr4d 2879 1 (𝜑 → 𝑈 ∈ 𝑊)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1570   ∈ wcel 2147  ⟨cop 4838   class class class wbr 5106   × cxp 5654
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  ax-sep 5253  ax-pr 5396
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-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-br 5107  df-opab 5172  df-xp 5662
This theorem is used by:  fuco11  50663  fuco11cl  50664  fuco21  50673
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