 4:49 AM
Hi @MartinSleziak, do you think I shall post the question on MathOverflow?
5  Suppose $A,B \in M_{n}(\Bbb{R})$ such that $A = \left[C_{1}\middle|\frac{I}{0\dots0}\right], B= \left[C_{2}\middle|\frac{I}{0\dots0}\right]$ , where $A$ and $B$ have different first columns (represented as $C_{1}, C_{2}$). Let $\lambda_{i}, i=1, \ldots, n$ denote the eigenvalues of $AB^2$. Then ...

I think more researchers might see it there

2 hours later… 6:24 AM
0  Suppose $A,B \in M_{n}(\Bbb{R})$ such that $A = \left[C_{1}\middle|\frac{I}{0\dots0}\right], B= \left[C_{2}\middle|\frac{I}{0\dots0}\right]$ , where $A$ and $B$ have different first columns (represented as $C_{1}, C_{2}$). Let $\lambda_{i}, i=1, \ldots, n$ denote the eigenvalues of $AB^2$. Then ... 6:55 AM
Cross-posted from math.stackexchange.com/q/4487196/42969. – See meta.mathoverflow.net/a/2638/116247 for some guidelines about cross-posting (wait some days, provide links, ...) — Martin R 8 mins ago

13 hours later… 7:51 PM
42  This tag is in phase 2 of the burnination process described here. The question and comments have been cleaned to allow for on-topic discussion about the burnination of this tag. Please keep it that way. If you want to discuss the process of burnination itself, post a new question on Meta or vis...