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Theorem 3oalem1 31995
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 31565 . . . 4 (𝑥𝐵𝑥 ∈ ℋ)
3 3oalem1.3 . . . . 5 𝑅C
43cheli 31565 . . . 4 (𝑦𝑅𝑦 ∈ ℋ)
52, 4anim12i 624 . . 3 ((𝑥𝐵𝑦𝑅) → (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))
6 hvaddcl 31345 . . . . 5 ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑥 + 𝑦) ∈ ℋ)
7 eleq1 2851 . . . . 5 (𝑣 = (𝑥 + 𝑦) → (𝑣 ∈ ℋ ↔ (𝑥 + 𝑦) ∈ ℋ))
86, 7syl5ibrcom 250 . . . 4 ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑣 = (𝑥 + 𝑦) → 𝑣 ∈ ℋ))
98imdistani 578 . . 3 (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 = (𝑥 + 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
105, 9sylan 591 . 2 (((𝑥𝐵𝑦𝑅) ∧ 𝑣 = (𝑥 + 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
11 3oalem1.2 . . . . 5 𝐶C
1211cheli 31565 . . . 4 (𝑧𝐶𝑧 ∈ ℋ)
13 3oalem1.4 . . . . 5 𝑆C
1413cheli 31565 . . . 4 (𝑤𝑆𝑤 ∈ ℋ)
1512, 14anim12i 624 . . 3 ((𝑧𝐶𝑤𝑆) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
1615adantr 485 . 2 (((𝑧𝐶𝑤𝑆) ∧ 𝑣 = (𝑧 + 𝑤)) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
1710, 16anim12i 624 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 400   = wceq 1570  wcel 2143  (class class class)co 7412  chba 31252   + cva 31253   C cch 31262
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pr 5406  ax-hilex 31332  ax-hfvadd 31333
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-fv 6546  df-ov 7415  df-sh 31540  df-ch 31554
This theorem is referenced by:  3oalem2  31996
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