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Theorem 3oalem1 31609
Description: Lemma for 3OA (weak) orthoarguesian law. (Contributed by NM, 19-Oct-1999.) (New usage is discouraged.)
Hypotheses
Ref Expression
3oalem1.1 𝐵C
3oalem1.2 𝐶C
3oalem1.3 𝑅C
3oalem1.4 𝑆C
Assertion
Ref Expression
3oalem1 ((((𝑥𝐵𝑦𝑅) ∧ 𝑣 = (𝑥 + 𝑦)) ∧ ((𝑧𝐶𝑤𝑆) ∧ 𝑣 = (𝑧 + 𝑤))) → (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ) ∧ (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ)))
Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝑣,𝐵   𝑥,𝐶,𝑦,𝑧,𝑤,𝑣   𝑥,𝑅,𝑦,𝑧,𝑤,𝑣   𝑥,𝑆,𝑦,𝑧,𝑤,𝑣

Proof of Theorem 3oalem1
StepHypRef Expression
1 3oalem1.1 . . . . 5 𝐵C
21cheli 31179 . . . 4 (𝑥𝐵𝑥 ∈ ℋ)
3 3oalem1.3 . . . . 5 𝑅C
43cheli 31179 . . . 4 (𝑦𝑅𝑦 ∈ ℋ)
52, 4anim12i 613 . . 3 ((𝑥𝐵𝑦𝑅) → (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))
6 hvaddcl 30959 . . . . 5 ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑥 + 𝑦) ∈ ℋ)
7 eleq1 2821 . . . . 5 (𝑣 = (𝑥 + 𝑦) → (𝑣 ∈ ℋ ↔ (𝑥 + 𝑦) ∈ ℋ))
86, 7syl5ibrcom 247 . . . 4 ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑣 = (𝑥 + 𝑦) → 𝑣 ∈ ℋ))
98imdistani 568 . . 3 (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 = (𝑥 + 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
105, 9sylan 580 . 2 (((𝑥𝐵𝑦𝑅) ∧ 𝑣 = (𝑥 + 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
11 3oalem1.2 . . . . 5 𝐶C
1211cheli 31179 . . . 4 (𝑧𝐶𝑧 ∈ ℋ)
13 3oalem1.4 . . . . 5 𝑆C
1413cheli 31179 . . . 4 (𝑤𝑆𝑤 ∈ ℋ)
1512, 14anim12i 613 . . 3 ((𝑧𝐶𝑤𝑆) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
1615adantr 480 . 2 (((𝑧𝐶𝑤𝑆) ∧ 𝑣 = (𝑧 + 𝑤)) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
1710, 16anim12i 613 1 ((((𝑥𝐵𝑦𝑅) ∧ 𝑣 = (𝑥 + 𝑦)) ∧ ((𝑧𝐶𝑤𝑆) ∧ 𝑣 = (𝑧 + 𝑤))) → (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ) ∧ (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1539  wcel 2107  (class class class)co 7413  chba 30866   + cva 30867   C cch 30876
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-10 2140  ax-11 2156  ax-12 2176  ax-ext 2706  ax-sep 5276  ax-nul 5286  ax-pr 5412  ax-hilex 30946  ax-hfvadd 30947
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2064  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2808  df-nfc 2884  df-ne 2932  df-ral 3051  df-rex 3060  df-rab 3420  df-v 3465  df-sbc 3771  df-csb 3880  df-dif 3934  df-un 3936  df-in 3938  df-ss 3948  df-nul 4314  df-if 4506  df-pw 4582  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4888  df-iun 4973  df-br 5124  df-opab 5186  df-mpt 5206  df-id 5558  df-xp 5671  df-rel 5672  df-cnv 5673  df-co 5674  df-dm 5675  df-rn 5676  df-res 5677  df-ima 5678  df-iota 6494  df-fun 6543  df-fn 6544  df-f 6545  df-fv 6549  df-ov 7416  df-sh 31154  df-ch 31168
This theorem is referenced by:  3oalem2  31610
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