7 May
2013
7 May
'13
11:23 a.m.
On 07/05/2013 18:08, Neil Sloane wrote:
That's related to several questions that have interested me for decades. Here's a simple version: choose your favorite matrix ring R, e.g. real matrices with entries that are 0 or 1. What is a(n) := number of nxn matrices in R that have a square root in R?
That doesn't look like a ring. Are you intending the entries to be taken mod 2, or are you using (max,min) instead of (+,*) or something like that, or what? -- g