What is $R^0$ when $R=0$?
14150
Zero to the zero power – is $0^0=1$?
157266
Can a nonzero polynomial evaluate to the zero function in a suitable infinite ring of char 0?
115583
prove that $a^2(p-q)(p-r)+b^2(q-p)(q-r)+c^2(r-p)(r-q)\ge 0$
152451
REVISITED $^2$: Does a solution in $\mathbb{R}^n$ imply a solution in $\mathbb{Q}^n$?
72872
Number of zeroes of solution to $y''(x)+e^{x^2}y(x)=0$ in $[0,3π]$
90043
Show that if $r$ is an nth root of $1$ and $r\ne1$, then $1 + r + r^2 + ... + r^{n-1} = 0$.
138972
When is R squared negative?
73677
If the matrix $A^3 = 0$, is $A$ singular?
66272
Is there a common notion of $\mathbb{R}^n$, for non-integer $n$?
6402
What does negative R-squared mean?
57981
Alternative proof of $a\times0= 0$
158335
Why is this $0 = 1$ proof wrong?
34520
Is $0\,\mathrm{m}$ dimensionless?
137048
If $p, q, r$ are the roots of $x^3 -x+1=0$, what is $p^5 + q^5 + r^5$?
39179
Why is $(0, 0)$ not a minimum of $f(x, y) = (y-3x^2)(y-x^2)$?
106033
Solve the system in $\mathbb{R}$
151519
If $f(f(x))=x^2-x+1$, what is $f(0)$?