Christian Ivicevic
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 Oct 19 asked Prove equivalence of conditions for a tree Oct 3 accepted Ignoring $\max$ for discrete random variables Oct 3 asked Ignoring $\max$ for discrete random variables Sep 5 answered Is $[0,4,4]^T$ in the plane in $\mathbb{R}^3$ spanned by the columns of $A$? Sep 4 awarded Teacher Sep 4 answered Is the cycle graph $C_n$ defined only for $n \ge 3$? Sep 4 comment 3rd roots of unity as eigenvectors Thanks for your efforts - just because of this I will accept your answer as it is now complete with both descriptions! Sep 4 accepted 3rd roots of unity as eigenvectors Sep 4 comment 3rd roots of unity as eigenvectors I tried it now a few times and fail though I do use your suggested relations. My current matrix looks like $((1,0,0)^T,(1+\zeta^2,1,0)^T,(0,1+\zeta^2,-2\zeta-\zeta^2)^T)$. I assume that the rank should be 2 and therefore at least my last line is wrong :/ Sep 4 comment 3rd roots of unity as eigenvectors I got used to write $z$ and $\lambda$ for the variable of my characteristic polynomials so I just didn't change anything to be at least consistent with my notation, thanks for the hint though :) Sep 4 comment 3rd roots of unity as eigenvectors I am trying to solve it with the general approach as we both mentioned but I get horrible results - is there any way I could persuade you to show me how to use the kernel approach in this particular case? Sep 4 asked 3rd roots of unity as eigenvectors Sep 3 accepted Subspaces $\mathcal{C_k}\subset(\mathbb{Z}/2\mathbb{Z})^3$ with $\dim(\mathcal{C_k})=2$ Sep 2 asked Subspaces $\mathcal{C_k}\subset(\mathbb{Z}/2\mathbb{Z})^3$ with $\dim(\mathcal{C_k})=2$ Aug 23 accepted Dimensions of symmetric and skew-symmetric matrices Aug 23 comment Dimensions of symmetric and skew-symmetric matrices @RijulSaini: Thanks, but enzotib's answer seems to be easier to understand! Aug 23 comment Dimensions of symmetric and skew-symmetric matrices But this is no explanation why the symmetric matrices have the specified $\dim$. Aug 23 comment Dimensions of symmetric and skew-symmetric matrices I did edit it - thanks for the reminder! Aug 23 revised Dimensions of symmetric and skew-symmetric matrices added 45 characters in body; edited title Aug 23 asked Dimensions of symmetric and skew-symmetric matrices