Searching two matrix A and B, such that exp(A+B)=exp(A)exp(B) but AB is not equal to BA.
1794
$\exp(A+B)$ and Baker-Campbell-Hausdorff
86841
Find a matrix $B$ such that $B^3 = A$
123555
Proving that if $ab=e$ then $ba=e$
139841
Proving $A\setminus(B\setminus C)$ is not equal to $(A\setminus B)\setminus C$
77667
A and B is similar ⇒ $A^T$ is similar to $B^T$.
1164
Why Numpy treats a+=b and a=a+b differently
3301
If $AB = I$ then $BA = I$
24809
For all square matrices $A$ and $B$ of the same size, it is true that $(A+B)^2 = A^2 + 2AB + B^2$?
33542
When is $A- B = B- A$?
94037
Solving the matrix equation $AP=PB$, where $A$ and $B$ are similar
102980
finding all numbers $a,b$ that divide $c$ but product of $a$ and $b$ does not divide $c$
13012
Why can a = b imply 2 = 1?
52882
find nonsingular matrices $B$ and $C$ that satisfy $BC+ CB= 0$
89190
Why is it true that $|AB:A|=|B:A\cap B|$ even if $A$ is not normal in $AB$? (Second Isomorphism Theorem)
141173
Are there matrices such that $AB=I$ and $BA \neq I$
99631
Prove/Disprove: Find $a\in S_4$ that is not a power of $b$ such that $ab=ba$ while $b=(123)$
62474
If $AB=I_n$ and $BA=I_m$ then $n=m$.