Is $\sqrt{-1}$ equal to $i$ or $\pm i$?
14633
What's the thing with $\sqrt{-1} = i$
75690
Does the given matrix have a square root?
16420
When does $\sqrt{wz}=\sqrt{w}\sqrt{z}$?
90276
Is $\sqrt{2}\in{\Bbb Z}[\sqrt{2}+\sqrt{3}]$ true?
72892
Does $\sqrt{x}$ have a limit for $x \to 0$?
110661
When does $\sqrt{a b} = \sqrt{a} \sqrt{b}$?
43834
Simple Complex Number Problem: $1 = -1$
77486
What is the value of $i^i$?
70974
How can zero divided by $i$ be $2\pi$?
144765
Solving $\sqrt{x+5} = x - 1$
44630
Is $\frac{1}{\sqrt{2}}$ a fraction or not?
17620
Why the principal value of complex number argument is taken within $(-\pi,\pi]?$
111432
Square root of a number squared is equal to the absolute value of that number
158356
Need a proofreading why all the units are satisfied $a^2-2b^2 =\pm1$ for $\mathbf{Z}[\sqrt{2}]$
81181
Prove that $\det(M-I)=0$ if $\det(M)=1$ and $MM^T=I$
127727
De Moivre Complex Roots: Definition of $i$ or $\sqrt {-1}$
122916
Does $[0.9999....]=1$?