A proper definition of $i$, the imaginary unit
35856
Refining my knowledge of the imaginary number
81585
What is the square root of complex number i?
35222
Characterizing units in polynomial rings
136287
Separate real and imaginary part of $\arccos(z)$
19884
The units of $\mathbb Z_4[x]$
154837
mapping properties of $(1−z)^i$
24688
Why are $i$ and $-i$ "more indistinguishable" than $\sqrt{2}$ and $-\sqrt{2}$?
111191
Show that $P_i$ and $\sum_i P_i$ being idempotent implies $P_i P_j=\delta_{ij}$
86381
What is imaginary time?
12401
Is it standard to say $-i \log(-1)$ is $\pi$?
29740
What is the physical significance of the imaginary part when plane waves are represented as $e^{i(kx-\omega t)}$?
135980
Geometric interpretation of a complex set
66134
Sufficiently many idempotents and commutativity
94433
Rigorous underpinnings of infinitesimals in physics
664
Minkowski's complex Euclidean space vs. the real pseudo-Euclidean version
120092
Express the complex numbers given in Problem in the form $a+ib$
32772
Proving units in a ring