Theorem 3oalem1 29441

Description: Lemma for 3OA (weak) orthoarguesian law. (Contributed by NM, 19-Oct-1999.) (New usage is discouraged.)

Hypotheses

Ref	Expression
3oalem1.1	⊢ 𝐵 ∈ Cℋ
3oalem1.2	⊢ 𝐶 ∈ Cℋ
3oalem1.3	⊢ 𝑅 ∈ Cℋ
3oalem1.4	⊢ 𝑆 ∈ Cℋ

Assertion

Ref	Expression
3oalem1	⊢ ((((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝑅) ∧ 𝑣 = (𝑥 +ℎ 𝑦)) ∧ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝑆) ∧ 𝑣 = (𝑧 +ℎ 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

Step	Hyp	Ref	Expression
1		3oalem1.1	. . . . 5 ⊢ 𝐵 ∈ Cℋ
2	1	cheli 29011	. . . 4 ⊢ (𝑥 ∈ 𝐵 → 𝑥 ∈ ℋ)
3		3oalem1.3	. . . . 5 ⊢ 𝑅 ∈ Cℋ
4	3	cheli 29011	. . . 4 ⊢ (𝑦 ∈ 𝑅 → 𝑦 ∈ ℋ)
5	2, 4	anim12i 614	. . 3 ⊢ ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝑅) → (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))
6		hvaddcl 28791	. . . . 5 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑥 +ℎ 𝑦) ∈ ℋ)
7		eleq1 2902	. . . . 5 ⊢ (𝑣 = (𝑥 +ℎ 𝑦) → (𝑣 ∈ ℋ ↔ (𝑥 +ℎ 𝑦) ∈ ℋ))
8	6, 7	syl5ibrcom 249	. . . 4 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑣 = (𝑥 +ℎ 𝑦) → 𝑣 ∈ ℋ))
9	8	imdistani 571	. . 3 ⊢ (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 = (𝑥 +ℎ 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
10	5, 9	sylan 582	. 2 ⊢ (((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝑅) ∧ 𝑣 = (𝑥 +ℎ 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
11		3oalem1.2	. . . . 5 ⊢ 𝐶 ∈ Cℋ
12	11	cheli 29011	. . . 4 ⊢ (𝑧 ∈ 𝐶 → 𝑧 ∈ ℋ)
13		3oalem1.4	. . . . 5 ⊢ 𝑆 ∈ Cℋ
14	13	cheli 29011	. . . 4 ⊢ (𝑤 ∈ 𝑆 → 𝑤 ∈ ℋ)
15	12, 14	anim12i 614	. . 3 ⊢ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝑆) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
16	15	adantr 483	. 2 ⊢ (((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝑆) ∧ 𝑣 = (𝑧 +ℎ 𝑤)) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
17	10, 16	anim12i 614	1 ⊢ ((((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝑅) ∧ 𝑣 = (𝑥 +ℎ 𝑦)) ∧ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝑆) ∧ 𝑣 = (𝑧 +ℎ 𝑤))) → (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ) ∧ (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ)))

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1537   ∈ wcel 2114  (class class class)co 7158   ℋchba 28698   +_ℎ cva 28699   C_ℋ cch 28708

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pr 5332  ax-hilex 28778  ax-hfvadd 28779

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-fv 6365  df-ov 7161  df-sh 28986  df-ch 29000

This theorem is referenced by:  3oalem2  29442