Theorem it1ei

Description: _i times 1 equals _i . (Contributed by SN, 25-Apr-2025)

	Ref	Expression
Assertion	it1ei	$$⊢\mathrm{i}\cdot 1=\mathrm{i}$$

Proof

Step	Hyp	Ref	Expression
1		ax-icn	$$⊢\mathrm{i}\in ℂ$$
2	1	mulridi	$$⊢\mathrm{i}\cdot 1=\mathrm{i}$$