Axiom ax-hvass 28778

Description: Vector addition is associative. (Contributed by NM, 3-Sep-1999.) (New usage is discouraged.)

Assertion

Ref	Expression
ax-hvass	⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ ∧ 𝐶 ∈ ℋ) → ((𝐴 +ℎ 𝐵) +ℎ 𝐶) = (𝐴 +ℎ (𝐵 +ℎ 𝐶)))

Detailed syntax breakdown of Axiom ax-hvass

Step	Hyp	Ref	Expression
1		cA	. . . 4 class 𝐴
2		chba 28695	. . . 4 class ℋ
3	1, 2	wcel 2110	. . 3 wff 𝐴 ∈ ℋ
4		cB	. . . 4 class 𝐵
5	4, 2	wcel 2110	. . 3 wff 𝐵 ∈ ℋ
6		cC	. . . 4 class 𝐶
7	6, 2	wcel 2110	. . 3 wff 𝐶 ∈ ℋ
8	3, 5, 7	w3a 1083	. 2 wff (𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ ∧ 𝐶 ∈ ℋ)
9		cva 28696	. . . . 5 class +ℎ
10	1, 4, 9	co 7155	. . . 4 class (𝐴 +ℎ 𝐵)
11	10, 6, 9	co 7155	. . 3 class ((𝐴 +ℎ 𝐵) +ℎ 𝐶)
12	4, 6, 9	co 7155	. . . 4 class (𝐵 +ℎ 𝐶)
13	1, 12, 9	co 7155	. . 3 class (𝐴 +ℎ (𝐵 +ℎ 𝐶))
14	11, 13	wceq 1533	. 2 wff ((𝐴 +ℎ 𝐵) +ℎ 𝐶) = (𝐴 +ℎ (𝐵 +ℎ 𝐶))
15	8, 14	wi 4	1 wff ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ ∧ 𝐶 ∈ ℋ) → ((𝐴 +ℎ 𝐵) +ℎ 𝐶) = (𝐴 +ℎ (𝐵 +ℎ 𝐶)))

This axiom is referenced by:  hvadd32  28810  hvadd12  28811  hvadd4  28812  hvpncan  28815  hvaddsubass  28817  hvassi  28829  hilablo  28936  spanunsni  29355  hoaddassi  29552