How do I see that $a = bu$ for some unit $u$?
132289
Associates in Integral Domain
1043
Image of $L=\{z\in\Bbb C \mid a\operatorname{Re}(z)+b\operatorname{Im}(z)+c=0; a^2+b^2\neq0; a,b,c\in \Bbb R \}$ under the function $e^z$
1394
How do we know that $F = ma$, not $F = k \cdot ma$
72092
If $A^2 = I$, $B^2=I$ and $(AB)^2=I$, then $AB = BA$
31173
How to show $(a^b)^c=a^{bc}$ for arbitrary cardinal numbers?
50142
If sup A $\lt$ sup B show that an element of $B$ is an upper bound of $A$
90475
Coordinate-free proof of $\operatorname{Tr}(AB)=\operatorname{Tr}(BA)$?
58741
Operator Exponential $e^A e^B = e^{A+B}$
52305
Is there a general relation between $a/b$ and $(a+c)/(b+c)$ where $a,b,c > 0 $?
38448
Show that a simple inequality holds: $a<b$ implies $\frac ab < \frac{a+1}{b+1}$
3301
If $AB = I$ then $BA = I$
66610
Finding a correspondence between $\{0,1\}^A$ and $\mathcal P(A)$
158356
Need a proofreading why all the units are satisfied $a^2-2b^2 =\pm1$ for $\mathbf{Z}[\sqrt{2}]$
50266
In the following figure prove that: $AK||BC$
46746
How to prove if $u\in W^{1,p}$, then $|u|\in W^{1,p}$?
78736
Check my proof that $(ab)^{-1} = b^{-1} a^{-1}$
128679
How to determine if two points lie on a vector, given a unit vector