 10:32 AM
A new tag was created. We already have and also .
0  I tried working out a solution to satisfy this equation and I got that this has no solution, however: $$1^2 + 2^2 + 2^2 = 3^2$$ so it does have a solution. I started off with the equation: $$a^2 + b^2 + c^2 = d^2$$ Therefore $a^2 + b^2 = d^2 - c^2$ and therefore: $$(a + b)^2 - 2ab = (d + c)... @fonfox and George: I will just point out that there already is a tag name (square-numbers). I am not sure whether it was necessary to create a new tag, but maybe (perfect-squares) and (square-numbers) could be synonyms. See also here. — Martin Sleziak 10 secs ago In fact, when I look at the synonyms for square-numbers, there already is a suggestion for this synonym. Sep 20 '15 at 11:40, by barto @barto I suggested the synonym -> , see here 2 hours later… 1:02 PM And also tag has been created recently. 14  The question is quite general and looks to explore the properties of quotient rings of the form$$\mathbb{Z}_{m}[X] / (f(x)) \quad \text{and} \quad \mathbb{R}[X]/(f(x))$$where m \in \mathbb{N} Classic examples of how one can treat such rings is to find relationships like$$\mathbb{Z}[x]/(1-...