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SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Steven Nguyen
Arithmetic theorems
it1ei
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1tiei
Metamath Proof Explorer
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Theorem
it1ei
Description:
_i
times 1 equals
_i
.
(Contributed by
SN
, 25-Apr-2025)
Ref
Expression
Assertion
it1ei
⊢
i
⋅
1
=
i
Proof
Step
Hyp
Ref
Expression
1
ax-icn
⊢
i
∈
ℂ
2
1
mulridi
⊢
i
⋅
1
=
i