2,962 reputation
2728
bio website tx.technion.ac.il/~felixg/…
location
age 31
visits member for 2 years, 10 months
seen Jan 26 at 18:08

Jan
21
asked Column Subset Selection implementations
Jan
9
comment Sets of spreads in graphs
@Anurag I don't have an example - I am hoping to construct one for an argument I am working on. Haemers and Tonchev say in the paper that they found five different spreads but don't say whether those spreads were pairwise disjoint. If you are interested (I thought you might be :) I'll be happy to disucss this further.
Jan
8
comment Sets of spreads in graphs
@domotorp I think that I need Baranyai's conclusion but for other hypergraphs than the complete ones.
Jan
7
revised Sets of spreads in graphs
added 1 character in body
Jan
7
asked Sets of spreads in graphs
Dec
27
comment Copositivity in matrix pencils
@PashaZusmanovich With pleasure.
Dec
27
revised Copositivity in matrix pencils
added 214 characters in body
Dec
21
awarded  Socratic
Dec
21
revised Open problems in compressed sensing
added 6 characters in body
Dec
21
comment Open problems in compressed sensing
@YemonChoi Well, I have an idea of what compressed sensing is - having read some articles and knowing a thing or two about linear algebra and signal processing, as background. But I cannot really tell which are the more fundamental problems, as opposed to sheer technicalities. That's why I asked for knowledgeable people, to give their estimate of what the main problems are - a bit like my old question mathoverflow.net/questions/118545/… which I think worked rather well. I did not ask anyone to write an encyclopaedia entry for me.
Dec
20
asked Open problems in compressed sensing
Dec
11
asked Colorful version of Fisher's inequality for block designs
Dec
11
accepted Can the graph Laplacian be well approximated by a Laplace-Beltrami operator?
Oct
26
comment Navigation in a graph
Can it happen that there is one short path from $x$ to $y$ but it passes "far from" $T$? In that case I don't see how you can do anything.
Oct
25
comment How many isolated roots can a polynomial in $z$ and $\overline{z}$ have?
@ChristianRemling I am not so sure - that question has two general unrelated variables. I am only interested in the case when $y=\overline{x}$.
Oct
25
revised How many isolated roots can a polynomial in $z$ and $\overline{z}$ have?
edited title
Oct
25
comment How many isolated roots can a polynomial in $z$ and $\overline{z}$ have?
Thanks to all who answered. Now I would like to sharpen the question - what about singular zeros?
Oct
25
revised How many isolated roots can a polynomial in $z$ and $\overline{z}$ have?
added 87 characters in body; edited title
Oct
25
asked How many isolated roots can a polynomial in $z$ and $\overline{z}$ have?
Oct
16
awarded  Popular Question