Is $i$ equal to $-i$?
3712
Why $\sqrt{-1 \cdot {-1}} \neq \sqrt{-1}^2$?
110075
How to show the given equality
33542
When is $A- B = B- A$?
145397
How to prove that for every $i$, $a_i = i$
41645
Checking my understanding: $1 - 1 + 1 - 1 + 1 - ... = \frac{1}{2}$
117533
$|A-\lambda I|$ and $|\lambda I-A|$
11857
$A$ be a complex $3\times 3$ matrix such that $A^3=-I$
12401
Is it standard to say $-i \log(-1)$ is $\pi$?
87265
If $(A-\lambda{I})$ is $\lambda$-equivalent to $(B-\lambda{I})$ then $A$ is similar to $B$
69131
Different proofs of $\,a^n-b^n =(a-b)\sum_{i=0}^{n-1} a^i b^{n-1-i} $?
70974
How can zero divided by $i$ be $2\pi$?
89758
Is there a formula for $(1+i)^n+(1-i)^n$?
63717
Is the closure of a set equal to the closure of the closure of that set?
71717
Is this always true: $P(A|B) = 1-P(A^c|B)$?
67678
When is "i += x" different from "i = i + x" in Python?
57780
$\sum_{i=1}^n i\cdot i! = (n+1)!-1$ By Induction
78575
If $A^2 = I$, then $\operatorname{rank} (A+I) + \operatorname{rank} (A-I) =n$