Eden Harder
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 Jul 1 awarded Popular Question Dec 16 awarded Nice Question Apr 19 comment How to transform matrix to this form by unitary transformation? Thanks! Will unitary transformation keeps the spectral radius? Apr 2 comment Is there such a matrix in $SO(n)$? @მამუკაჯიბლაძე I give an example for $n=2$ in a Mathematica file(click the link please) Apr 2 comment Is there such a matrix in $SO(n)$? @მამუკაჯიბლაძე Thanks for your comment! Note that $a'_i, b'_i$ may be un-normalized. Mar 25 comment making a graph well-covered without changing its Shannon capacity The new one added vertex should be adjacency with each vertex which can be in a maximum independent set at least. Jan 15 awarded Peer Pressure Jan 15 comment Lovász function of the Möbius ladder Since the Möbius ladder is isomorphic to the circulant graph $Ci_{2n}(1,n)$, we can think about $Ci_{2n}(1,n)$. But I have no idea too. Oct 29 awarded Scholar Oct 29 accepted What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? Oct 29 comment What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? Thanks so much Casteels! You're so kindly focus on this question. Oct 28 revised What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? edited tags Oct 28 comment What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? Thanks so much! Here is a similar question shows $log_2(q)+3/2$ will not be the right size. Oct 27 awarded Supporter Oct 27 comment What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? Thanks! Your answer is very helpful! I also considered Payley graphs, but it is not adequate to say the upper bound is infinity because the numerical result shows the maximum is $5.4$ for $q<9973$. Is there some other pattern of graphs whose $ϑ(G),α(G)$ are all known? Thanks again! Oct 27 revised What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? deleted 1 characters in body Oct 27 asked What is the maximum of the ratio $\vartheta(G)/\alpha(G)$? Sep 25 comment How to transform matrix to this form by unitary transformation? Thanks! Your answer is so helpful! May you kindly talk about why you choose the case where $(m_i) = (65, 72, 25, 69, 2)$ and which software do you use? Aug 24 awarded Commentator Aug 24 comment Nontransitive dice: the least number of faces? @WillSawin It is a cool idea! We can always to do this perturbation, but the nontransitivity is only related to the order of the numbers but not what they exactly are.