Theorem 3oalem1 29093

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 28661	. . . 4 ⊢ (𝑥 ∈ 𝐵 → 𝑥 ∈ ℋ)
3		3oalem1.3	. . . . 5 ⊢ 𝑅 ∈ Cℋ
4	3	cheli 28661	. . . 4 ⊢ (𝑦 ∈ 𝑅 → 𝑦 ∈ ℋ)
5	2, 4	anim12i 606	. . 3 ⊢ ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝑅) → (𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ))
6		hvaddcl 28441	. . . . 5 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑥 +ℎ 𝑦) ∈ ℋ)
7		eleq1 2847	. . . . 5 ⊢ (𝑣 = (𝑥 +ℎ 𝑦) → (𝑣 ∈ ℋ ↔ (𝑥 +ℎ 𝑦) ∈ ℋ))
8	6, 7	syl5ibrcom 239	. . . 4 ⊢ ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) → (𝑣 = (𝑥 +ℎ 𝑦) → 𝑣 ∈ ℋ))
9	8	imdistani 564	. . 3 ⊢ (((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 = (𝑥 +ℎ 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
10	5, 9	sylan 575	. 2 ⊢ (((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝑅) ∧ 𝑣 = (𝑥 +ℎ 𝑦)) → ((𝑥 ∈ ℋ ∧ 𝑦 ∈ ℋ) ∧ 𝑣 ∈ ℋ))
11		3oalem1.2	. . . . 5 ⊢ 𝐶 ∈ Cℋ
12	11	cheli 28661	. . . 4 ⊢ (𝑧 ∈ 𝐶 → 𝑧 ∈ ℋ)
13		3oalem1.4	. . . . 5 ⊢ 𝑆 ∈ Cℋ
14	13	cheli 28661	. . . 4 ⊢ (𝑤 ∈ 𝑆 → 𝑤 ∈ ℋ)
15	12, 14	anim12i 606	. . 3 ⊢ ((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝑆) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
16	15	adantr 474	. 2 ⊢ (((𝑧 ∈ 𝐶 ∧ 𝑤 ∈ 𝑆) ∧ 𝑣 = (𝑧 +ℎ 𝑤)) → (𝑧 ∈ ℋ ∧ 𝑤 ∈ ℋ))
17	10, 16	anim12i 606	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 386   = wceq 1601   ∈ wcel 2107  (class class class)co 6922   ℋchba 28348   +_ℎ cva 28349   C_ℋ cch 28358

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1839  ax-4 1853  ax-5 1953  ax-6 2021  ax-7 2055  ax-9 2116  ax-10 2135  ax-11 2150  ax-12 2163  ax-13 2334  ax-ext 2754  ax-sep 5017  ax-nul 5025  ax-pr 5138  ax-hilex 28428  ax-hfvadd 28429

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 837  df-3an 1073  df-tru 1605  df-ex 1824  df-nf 1828  df-sb 2012  df-mo 2551  df-eu 2587  df-clab 2764  df-cleq 2770  df-clel 2774  df-nfc 2921  df-ral 3095  df-rex 3096  df-rab 3099  df-v 3400  df-sbc 3653  df-csb 3752  df-dif 3795  df-un 3797  df-in 3799  df-ss 3806  df-nul 4142  df-if 4308  df-pw 4381  df-sn 4399  df-pr 4401  df-op 4405  df-uni 4672  df-iun 4755  df-br 4887  df-opab 4949  df-mpt 4966  df-id 5261  df-xp 5361  df-rel 5362  df-cnv 5363  df-co 5364  df-dm 5365  df-rn 5366  df-res 5367  df-ima 5368  df-iota 6099  df-fun 6137  df-fn 6138  df-f 6139  df-fv 6143  df-ov 6925  df-sh 28636  df-ch 28650

This theorem is referenced by:  3oalem2  29094