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Theorem brecop2OLD 8047
 Description: Obsolete version of brecop2 8046 as of 12-Jul-2022. (Contributed by NM, 13-Feb-1996.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
brecop2OLD.1 ∈ V
brecop2OLD.5 dom = (𝐺 × 𝐺)
brecop2OLD.6 𝐻 = ((𝐺 × 𝐺) / )
brecop2OLD.7 𝑅 ⊆ (𝐻 × 𝐻)
brecop2OLD.8 ⊆ (𝐺 × 𝐺)
brecop2OLD.9 ¬ ∅ ∈ 𝐺
brecop2OLD.10 dom + = (𝐺 × 𝐺)
brecop2OLD.11 (((𝐴𝐺𝐵𝐺) ∧ (𝐶𝐺𝐷𝐺)) → ([⟨𝐴, 𝐵⟩] 𝑅[⟨𝐶, 𝐷⟩] ↔ (𝐴 + 𝐷) (𝐵 + 𝐶)))
Assertion
Ref Expression
brecop2OLD ([⟨𝐴, 𝐵⟩] 𝑅[⟨𝐶, 𝐷⟩] ↔ (𝐴 + 𝐷) (𝐵 + 𝐶))

Proof of Theorem brecop2OLD
StepHypRef Expression
1 brecop2OLD.7 . . . 4 𝑅 ⊆ (𝐻 × 𝐻)
21brel 5338 . . 3 ([⟨𝐴, 𝐵⟩] 𝑅[⟨𝐶, 𝐷⟩] → ([⟨𝐴, 𝐵⟩] 𝐻 ∧ [⟨𝐶, 𝐷⟩] 𝐻))
3 brecop2OLD.5 . . . . . . 7 dom = (𝐺 × 𝐺)
4 ecelqsdm 8022 . . . . . . 7 ((dom = (𝐺 × 𝐺) ∧ [⟨𝐴, 𝐵⟩] ∈ ((𝐺 × 𝐺) / )) → ⟨𝐴, 𝐵⟩ ∈ (𝐺 × 𝐺))
53, 4mpan 681 . . . . . 6 ([⟨𝐴, 𝐵⟩] ∈ ((𝐺 × 𝐺) / ) → ⟨𝐴, 𝐵⟩ ∈ (𝐺 × 𝐺))
6 brecop2OLD.6 . . . . . 6 𝐻 = ((𝐺 × 𝐺) / )
75, 6eleq2s 2862 . . . . 5 ([⟨𝐴, 𝐵⟩] 𝐻 → ⟨𝐴, 𝐵⟩ ∈ (𝐺 × 𝐺))
8 opelxp 5315 . . . . 5 (⟨𝐴, 𝐵⟩ ∈ (𝐺 × 𝐺) ↔ (𝐴𝐺𝐵𝐺))
97, 8sylib 209 . . . 4 ([⟨𝐴, 𝐵⟩] 𝐻 → (𝐴𝐺𝐵𝐺))
10 ecelqsdm 8022 . . . . . . 7 ((dom = (𝐺 × 𝐺) ∧ [⟨𝐶, 𝐷⟩] ∈ ((𝐺 × 𝐺) / )) → ⟨𝐶, 𝐷⟩ ∈ (𝐺 × 𝐺))
113, 10mpan 681 . . . . . 6 ([⟨𝐶, 𝐷⟩] ∈ ((𝐺 × 𝐺) / ) → ⟨𝐶, 𝐷⟩ ∈ (𝐺 × 𝐺))
1211, 6eleq2s 2862 . . . . 5 ([⟨𝐶, 𝐷⟩] 𝐻 → ⟨𝐶, 𝐷⟩ ∈ (𝐺 × 𝐺))
13 opelxp 5315 . . . . 5 (⟨𝐶, 𝐷⟩ ∈ (𝐺 × 𝐺) ↔ (𝐶𝐺𝐷𝐺))
1412, 13sylib 209 . . . 4 ([⟨𝐶, 𝐷⟩] 𝐻 → (𝐶𝐺𝐷𝐺))
159, 14anim12i 606 . . 3 (([⟨𝐴, 𝐵⟩] 𝐻 ∧ [⟨𝐶, 𝐷⟩] 𝐻) → ((𝐴𝐺𝐵𝐺) ∧ (𝐶𝐺𝐷𝐺)))
162, 15syl 17 . 2 ([⟨𝐴, 𝐵⟩] 𝑅[⟨𝐶, 𝐷⟩] → ((𝐴𝐺𝐵𝐺) ∧ (𝐶𝐺𝐷𝐺)))
17 brecop2OLD.8 . . . . 5 ⊆ (𝐺 × 𝐺)
1817brel 5338 . . . 4 ((𝐴 + 𝐷) (𝐵 + 𝐶) → ((𝐴 + 𝐷) ∈ 𝐺 ∧ (𝐵 + 𝐶) ∈ 𝐺))
19 brecop2OLD.10 . . . . . 6 dom + = (𝐺 × 𝐺)
20 brecop2OLD.9 . . . . . 6 ¬ ∅ ∈ 𝐺
2119, 20ndmovrcl 7020 . . . . 5 ((𝐴 + 𝐷) ∈ 𝐺 → (𝐴𝐺𝐷𝐺))
2219, 20ndmovrcl 7020 . . . . 5 ((𝐵 + 𝐶) ∈ 𝐺 → (𝐵𝐺𝐶𝐺))
2321, 22anim12i 606 . . . 4 (((𝐴 + 𝐷) ∈ 𝐺 ∧ (𝐵 + 𝐶) ∈ 𝐺) → ((𝐴𝐺𝐷𝐺) ∧ (𝐵𝐺𝐶𝐺)))
2418, 23syl 17 . . 3 ((𝐴 + 𝐷) (𝐵 + 𝐶) → ((𝐴𝐺𝐷𝐺) ∧ (𝐵𝐺𝐶𝐺)))
25 an42 647 . . 3 (((𝐴𝐺𝐷𝐺) ∧ (𝐵𝐺𝐶𝐺)) ↔ ((𝐴𝐺𝐵𝐺) ∧ (𝐶𝐺𝐷𝐺)))
2624, 25sylib 209 . 2 ((𝐴 + 𝐷) (𝐵 + 𝐶) → ((𝐴𝐺𝐵𝐺) ∧ (𝐶𝐺𝐷𝐺)))
27 brecop2OLD.11 . 2 (((𝐴𝐺𝐵𝐺) ∧ (𝐶𝐺𝐷𝐺)) → ([⟨𝐴, 𝐵⟩] 𝑅[⟨𝐶, 𝐷⟩] ↔ (𝐴 + 𝐷) (𝐵 + 𝐶)))
2816, 26, 27pm5.21nii 369 1 ([⟨𝐴, 𝐵⟩] 𝑅[⟨𝐶, 𝐷⟩] ↔ (𝐴 + 𝐷) (𝐵 + 𝐶))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 197   ∧ wa 384   = wceq 1652   ∈ wcel 2155  Vcvv 3350   ⊆ wss 3734  ∅c0 4081  ⟨cop 4342   class class class wbr 4811   × cxp 5277  dom cdm 5279  (class class class)co 6844  [cec 7947   / cqs 7948 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-sep 4943  ax-nul 4951  ax-pow 5003  ax-pr 5064 This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-ral 3060  df-rex 3061  df-rab 3064  df-v 3352  df-sbc 3599  df-dif 3737  df-un 3739  df-in 3741  df-ss 3748  df-nul 4082  df-if 4246  df-sn 4337  df-pr 4339  df-op 4343  df-uni 4597  df-br 4812  df-opab 4874  df-xp 5285  df-cnv 5287  df-dm 5289  df-rn 5290  df-res 5291  df-ima 5292  df-iota 6033  df-fv 6078  df-ov 6847  df-ec 7951  df-qs 7955 This theorem is referenced by: (None)
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