Timeline for On the divisibility of the special linear group of degree $n$ over an algebraically closed field

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Apr 13, 2017 at 12:58	history	edited	CommunityBot		replaced http://mathoverflow.net/ with https://mathoverflow.net/
Mar 21, 2013 at 19:59	answer	added	Ralph		timeline score: 5
Mar 21, 2013 at 19:33	history	edited	Salvo Tringali	CC BY-SA 3.0	Added a (couple of) new question(s); added 12 characters in body
Mar 21, 2013 at 13:31	comment	added	Salvo Tringali		Ehr... Yes, but somehow I missed this "limit case" while working to something slightly more general: If $J = \left[\begin{array}{cc} \lambda & \mu \\ 0 & \lambda^{−1}\end{array}\right]$ for some $\lambda \in \mathbb C^\times\setminus\{−1\}$ and $\mu \in \mathbb C$, then $\left[\begin{array}{cc} a & c \\ 0 & b\end{array}\right]^2=J$ for $a=\|\lambda\|^{1/2}e^{i\frac{\theta}{2}}$, $b=a^{−1}$ and $c=(a+b)^{−1} \mu$, where $\theta$ is (the principal value of) the complex argument of $\lambda$. I edited the OP, fixed my mistake, and updated Q2. Thanks!
Mar 21, 2013 at 12:22	history	edited	Salvo Tringali	CC BY-SA 3.0	Fixed a mistake; added 23 characters in body
Mar 21, 2013 at 11:17	comment	added	user30035		Did you try the obvious place to start, namely a $2\times 2$ Jordan block with $-1$s on the diagonal?
Mar 21, 2013 at 10:25	history	edited	Salvo Tringali	CC BY-SA 3.0	Fixed a typo in the title; deleted 31 characters in body
Mar 21, 2013 at 10:12	history	asked	Salvo Tringali	CC BY-SA 3.0