Theorem hvcomi

Description: Commutation of vector addition. (Contributed by NM, 3-Sep-1999) (New usage is discouraged.)

	Ref	Expression
Hypotheses	hvaddcl.1	$$⊢A\in \mathscr{H}$$
	hvaddcl.2	$$⊢B\in \mathscr{H}$$
Assertion	hvcomi	$$⊢A{+}_{ℎ}B=B{+}_{ℎ}A$$

Proof

Step	Hyp	Ref	Expression
1		hvaddcl.1	$$⊢A\in \mathscr{H}$$
2		hvaddcl.2	$$⊢B\in \mathscr{H}$$
3		ax-hvcom	$$⊢\left(A\in \mathscr{H}\wedge B\in \mathscr{H}\right)\to A{+}_{ℎ}B=B{+}_{ℎ}A$$
4	1 2 3	mp2an	$$⊢A{+}_{ℎ}B=B{+}_{ℎ}A$$