Theorem ecopovtrn 6598

Description: Assuming that operation 𝐹 is commutative (second hypothesis), closed (third hypothesis), associative (fourth hypothesis), and has the cancellation property (fifth hypothesis), show that the relation ∼, specified by the first hypothesis, is transitive. (Contributed by NM, 11-Feb-1996.) (Revised by Mario Carneiro, 26-Apr-2015.)

Hypotheses

Ref	Expression
ecopopr.1	⊢ ∼ = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (𝑆 × 𝑆) ∧ 𝑦 ∈ (𝑆 × 𝑆)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 + 𝑢) = (𝑤 + 𝑣)))}
ecopopr.com	⊢ (𝑥 + 𝑦) = (𝑦 + 𝑥)
ecopopr.cl	⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → (𝑥 + 𝑦) ∈ 𝑆)
ecopopr.ass	⊢ ((𝑥 + 𝑦) + 𝑧) = (𝑥 + (𝑦 + 𝑧))
ecopopr.can	⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥 + 𝑦) = (𝑥 + 𝑧) → 𝑦 = 𝑧))

Assertion

Ref	Expression
ecopovtrn	⊢ ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶) → 𝐴 ∼ 𝐶)

Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝑣,𝑢, +   𝑥,𝑆,𝑦,𝑧,𝑤,𝑣,𝑢

Allowed substitution hints:   𝐴(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢)   𝐵(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢)   𝐶(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢)   ∼ (𝑥,𝑦,𝑧,𝑤,𝑣,𝑢)

Proof of Theorem ecopovtrn

Dummy variables 𝑓 𝑔 ℎ 𝑡 𝑠 𝑟 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ecopopr.1	. . . . . . 7 ⊢ ∼ = {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (𝑆 × 𝑆) ∧ 𝑦 ∈ (𝑆 × 𝑆)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 + 𝑢) = (𝑤 + 𝑣)))}
2		opabssxp 4678	. . . . . . 7 ⊢ {⟨𝑥, 𝑦⟩ ∣ ((𝑥 ∈ (𝑆 × 𝑆) ∧ 𝑦 ∈ (𝑆 × 𝑆)) ∧ ∃𝑧∃𝑤∃𝑣∃𝑢((𝑥 = ⟨𝑧, 𝑤⟩ ∧ 𝑦 = ⟨𝑣, 𝑢⟩) ∧ (𝑧 + 𝑢) = (𝑤 + 𝑣)))} ⊆ ((𝑆 × 𝑆) × (𝑆 × 𝑆))
3	1, 2	eqsstri 3174	. . . . . 6 ⊢ ∼ ⊆ ((𝑆 × 𝑆) × (𝑆 × 𝑆))
4	3	brel 4656	. . . . 5 ⊢ (𝐴 ∼ 𝐵 → (𝐴 ∈ (𝑆 × 𝑆) ∧ 𝐵 ∈ (𝑆 × 𝑆)))
5	4	simpld 111	. . . 4 ⊢ (𝐴 ∼ 𝐵 → 𝐴 ∈ (𝑆 × 𝑆))
6	3	brel 4656	. . . 4 ⊢ (𝐵 ∼ 𝐶 → (𝐵 ∈ (𝑆 × 𝑆) ∧ 𝐶 ∈ (𝑆 × 𝑆)))
7	5, 6	anim12i 336	. . 3 ⊢ ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶) → (𝐴 ∈ (𝑆 × 𝑆) ∧ (𝐵 ∈ (𝑆 × 𝑆) ∧ 𝐶 ∈ (𝑆 × 𝑆))))
8		3anass 972	. . 3 ⊢ ((𝐴 ∈ (𝑆 × 𝑆) ∧ 𝐵 ∈ (𝑆 × 𝑆) ∧ 𝐶 ∈ (𝑆 × 𝑆)) ↔ (𝐴 ∈ (𝑆 × 𝑆) ∧ (𝐵 ∈ (𝑆 × 𝑆) ∧ 𝐶 ∈ (𝑆 × 𝑆))))
9	7, 8	sylibr 133	. 2 ⊢ ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶) → (𝐴 ∈ (𝑆 × 𝑆) ∧ 𝐵 ∈ (𝑆 × 𝑆) ∧ 𝐶 ∈ (𝑆 × 𝑆)))
10		eqid 2165	. . 3 ⊢ (𝑆 × 𝑆) = (𝑆 × 𝑆)
11		breq1 3985	. . . . 5 ⊢ (⟨𝑓, 𝑔⟩ = 𝐴 → (⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ↔ 𝐴 ∼ ⟨ℎ, 𝑡⟩))
12	11	anbi1d 461	. . . 4 ⊢ (⟨𝑓, 𝑔⟩ = 𝐴 → ((⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) ↔ (𝐴 ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩)))
13		breq1 3985	. . . 4 ⊢ (⟨𝑓, 𝑔⟩ = 𝐴 → (⟨𝑓, 𝑔⟩ ∼ ⟨𝑠, 𝑟⟩ ↔ 𝐴 ∼ ⟨𝑠, 𝑟⟩))
14	12, 13	imbi12d 233	. . 3 ⊢ (⟨𝑓, 𝑔⟩ = 𝐴 → (((⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) → ⟨𝑓, 𝑔⟩ ∼ ⟨𝑠, 𝑟⟩) ↔ ((𝐴 ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) → 𝐴 ∼ ⟨𝑠, 𝑟⟩)))
15		breq2 3986	. . . . 5 ⊢ (⟨ℎ, 𝑡⟩ = 𝐵 → (𝐴 ∼ ⟨ℎ, 𝑡⟩ ↔ 𝐴 ∼ 𝐵))
16		breq1 3985	. . . . 5 ⊢ (⟨ℎ, 𝑡⟩ = 𝐵 → (⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩ ↔ 𝐵 ∼ ⟨𝑠, 𝑟⟩))
17	15, 16	anbi12d 465	. . . 4 ⊢ (⟨ℎ, 𝑡⟩ = 𝐵 → ((𝐴 ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) ↔ (𝐴 ∼ 𝐵 ∧ 𝐵 ∼ ⟨𝑠, 𝑟⟩)))
18	17	imbi1d 230	. . 3 ⊢ (⟨ℎ, 𝑡⟩ = 𝐵 → (((𝐴 ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) → 𝐴 ∼ ⟨𝑠, 𝑟⟩) ↔ ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ ⟨𝑠, 𝑟⟩) → 𝐴 ∼ ⟨𝑠, 𝑟⟩)))
19		breq2 3986	. . . . 5 ⊢ (⟨𝑠, 𝑟⟩ = 𝐶 → (𝐵 ∼ ⟨𝑠, 𝑟⟩ ↔ 𝐵 ∼ 𝐶))
20	19	anbi2d 460	. . . 4 ⊢ (⟨𝑠, 𝑟⟩ = 𝐶 → ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ ⟨𝑠, 𝑟⟩) ↔ (𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶)))
21		breq2 3986	. . . 4 ⊢ (⟨𝑠, 𝑟⟩ = 𝐶 → (𝐴 ∼ ⟨𝑠, 𝑟⟩ ↔ 𝐴 ∼ 𝐶))
22	20, 21	imbi12d 233	. . 3 ⊢ (⟨𝑠, 𝑟⟩ = 𝐶 → (((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ ⟨𝑠, 𝑟⟩) → 𝐴 ∼ ⟨𝑠, 𝑟⟩) ↔ ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶) → 𝐴 ∼ 𝐶)))
23	1	ecopoveq 6596	. . . . . . . 8 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆)) → (⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ↔ (𝑓 + 𝑡) = (𝑔 + ℎ)))
24	23	3adant3 1007	. . . . . . 7 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ↔ (𝑓 + 𝑡) = (𝑔 + ℎ)))
25	1	ecopoveq 6596	. . . . . . . 8 ⊢ (((ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩ ↔ (ℎ + 𝑟) = (𝑡 + 𝑠)))
26	25	3adant1 1005	. . . . . . 7 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩ ↔ (ℎ + 𝑟) = (𝑡 + 𝑠)))
27	24, 26	anbi12d 465	. . . . . 6 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) ↔ ((𝑓 + 𝑡) = (𝑔 + ℎ) ∧ (ℎ + 𝑟) = (𝑡 + 𝑠))))
28		oveq12 5851	. . . . . . 7 ⊢ (((𝑓 + 𝑡) = (𝑔 + ℎ) ∧ (ℎ + 𝑟) = (𝑡 + 𝑠)) → ((𝑓 + 𝑡) + (ℎ + 𝑟)) = ((𝑔 + ℎ) + (𝑡 + 𝑠)))
29		simp2l 1013	. . . . . . . . 9 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ℎ ∈ 𝑆)
30		simp2r 1014	. . . . . . . . 9 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → 𝑡 ∈ 𝑆)
31		simp1l 1011	. . . . . . . . 9 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → 𝑓 ∈ 𝑆)
32		ecopopr.com	. . . . . . . . . 10 ⊢ (𝑥 + 𝑦) = (𝑦 + 𝑥)
33	32	a1i 9	. . . . . . . . 9 ⊢ ((((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) = (𝑦 + 𝑥))
34		ecopopr.ass	. . . . . . . . . 10 ⊢ ((𝑥 + 𝑦) + 𝑧) = (𝑥 + (𝑦 + 𝑧))
35	34	a1i 9	. . . . . . . . 9 ⊢ ((((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆)) → ((𝑥 + 𝑦) + 𝑧) = (𝑥 + (𝑦 + 𝑧)))
36		simp3r 1016	. . . . . . . . 9 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → 𝑟 ∈ 𝑆)
37		ecopopr.cl	. . . . . . . . . 10 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → (𝑥 + 𝑦) ∈ 𝑆)
38	37	adantl 275	. . . . . . . . 9 ⊢ ((((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) ∈ 𝑆)
39	29, 30, 31, 33, 35, 36, 38	caov411d 6027	. . . . . . . 8 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((ℎ + 𝑡) + (𝑓 + 𝑟)) = ((𝑓 + 𝑡) + (ℎ + 𝑟)))
40		simp1r 1012	. . . . . . . . . 10 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → 𝑔 ∈ 𝑆)
41		simp3l 1015	. . . . . . . . . 10 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → 𝑠 ∈ 𝑆)
42	40, 30, 29, 33, 35, 41, 38	caov411d 6027	. . . . . . . . 9 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((𝑔 + 𝑡) + (ℎ + 𝑠)) = ((ℎ + 𝑡) + (𝑔 + 𝑠)))
43	40, 30, 29, 33, 35, 41, 38	caov4d 6026	. . . . . . . . 9 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((𝑔 + 𝑡) + (ℎ + 𝑠)) = ((𝑔 + ℎ) + (𝑡 + 𝑠)))
44	42, 43	eqtr3d 2200	. . . . . . . 8 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((ℎ + 𝑡) + (𝑔 + 𝑠)) = ((𝑔 + ℎ) + (𝑡 + 𝑠)))
45	39, 44	eqeq12d 2180	. . . . . . 7 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (((ℎ + 𝑡) + (𝑓 + 𝑟)) = ((ℎ + 𝑡) + (𝑔 + 𝑠)) ↔ ((𝑓 + 𝑡) + (ℎ + 𝑟)) = ((𝑔 + ℎ) + (𝑡 + 𝑠))))
46	28, 45	syl5ibr 155	. . . . . 6 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (((𝑓 + 𝑡) = (𝑔 + ℎ) ∧ (ℎ + 𝑟) = (𝑡 + 𝑠)) → ((ℎ + 𝑡) + (𝑓 + 𝑟)) = ((ℎ + 𝑡) + (𝑔 + 𝑠))))
47	27, 46	sylbid 149	. . . . 5 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) → ((ℎ + 𝑡) + (𝑓 + 𝑟)) = ((ℎ + 𝑡) + (𝑔 + 𝑠))))
48		ecopopr.can	. . . . . . . . 9 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → ((𝑥 + 𝑦) = (𝑥 + 𝑧) → 𝑦 = 𝑧))
49	48	3adant3 1007	. . . . . . . 8 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆) → ((𝑥 + 𝑦) = (𝑥 + 𝑧) → 𝑦 = 𝑧))
50		oveq2 5850	. . . . . . . 8 ⊢ (𝑦 = 𝑧 → (𝑥 + 𝑦) = (𝑥 + 𝑧))
51	49, 50	impbid1 141	. . . . . . 7 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆) → ((𝑥 + 𝑦) = (𝑥 + 𝑧) ↔ 𝑦 = 𝑧))
52	51	adantl 275	. . . . . 6 ⊢ ((((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆)) → ((𝑥 + 𝑦) = (𝑥 + 𝑧) ↔ 𝑦 = 𝑧))
53	37	caovcl 5996	. . . . . . 7 ⊢ ((ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) → (ℎ + 𝑡) ∈ 𝑆)
54	29, 30, 53	syl2anc 409	. . . . . 6 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (ℎ + 𝑡) ∈ 𝑆)
55	37	caovcl 5996	. . . . . . 7 ⊢ ((𝑓 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆) → (𝑓 + 𝑟) ∈ 𝑆)
56	31, 36, 55	syl2anc 409	. . . . . 6 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (𝑓 + 𝑟) ∈ 𝑆)
57	38, 40, 41	caovcld 5995	. . . . . 6 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (𝑔 + 𝑠) ∈ 𝑆)
58	52, 54, 56, 57	caovcand 6004	. . . . 5 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (((ℎ + 𝑡) + (𝑓 + 𝑟)) = ((ℎ + 𝑡) + (𝑔 + 𝑠)) ↔ (𝑓 + 𝑟) = (𝑔 + 𝑠)))
59	47, 58	sylibd 148	. . . 4 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) → (𝑓 + 𝑟) = (𝑔 + 𝑠)))
60	1	ecopoveq 6596	. . . . 5 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (⟨𝑓, 𝑔⟩ ∼ ⟨𝑠, 𝑟⟩ ↔ (𝑓 + 𝑟) = (𝑔 + 𝑠)))
61	60	3adant2 1006	. . . 4 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → (⟨𝑓, 𝑔⟩ ∼ ⟨𝑠, 𝑟⟩ ↔ (𝑓 + 𝑟) = (𝑔 + 𝑠)))
62	59, 61	sylibrd 168	. . 3 ⊢ (((𝑓 ∈ 𝑆 ∧ 𝑔 ∈ 𝑆) ∧ (ℎ ∈ 𝑆 ∧ 𝑡 ∈ 𝑆) ∧ (𝑠 ∈ 𝑆 ∧ 𝑟 ∈ 𝑆)) → ((⟨𝑓, 𝑔⟩ ∼ ⟨ℎ, 𝑡⟩ ∧ ⟨ℎ, 𝑡⟩ ∼ ⟨𝑠, 𝑟⟩) → ⟨𝑓, 𝑔⟩ ∼ ⟨𝑠, 𝑟⟩))
63	10, 14, 18, 22, 62	3optocl 4682	. 2 ⊢ ((𝐴 ∈ (𝑆 × 𝑆) ∧ 𝐵 ∈ (𝑆 × 𝑆) ∧ 𝐶 ∈ (𝑆 × 𝑆)) → ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶) → 𝐴 ∼ 𝐶))
64	9, 63	mpcom 36	1 ⊢ ((𝐴 ∼ 𝐵 ∧ 𝐵 ∼ 𝐶) → 𝐴 ∼ 𝐶)

Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   ∧ w3a 968   = wceq 1343  ∃wex 1480   ∈ wcel 2136  ⟨cop 3579   class class class wbr 3982  {copab 4042   × cxp 4602  (class class class)co 5842

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187

This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-xp 4610  df-iota 5153  df-fv 5196  df-ov 5845

This theorem is referenced by:  ecopover  6599