2,859 reputation
1728
bio website tx.technion.ac.il/~felixg/…
location
age 31
visits member for 2 years, 9 months
seen yesterday

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
Oct
12
comment eigenvalue estimate of the adjacency matrix
@DelioMugnolo Which paper would that be? Thanks.
Oct
9
revised eigenvalue estimate of the adjacency matrix
added 8 characters in body
Oct
9
answered eigenvalue estimate of the adjacency matrix
Oct
9
comment eigenvalue estimate of the adjacency matrix
Just making sure: are you interested in lower bounds for $\lambda_{\min}$ or for $|\lambda_{\min}|$?
Sep
30
awarded  Explainer
Sep
24
awarded  Nice Question
Sep
22
comment nonnegativity conditions for a polynomial in two variables
Can you give me a reference for the quartic case? This is a bit related to copositive matrices (a matrix can be thought of as a homogenous 2nd degree polynomial) but right now I can't offer any tangible result.
Sep
22
comment nonnegativity conditions for a polynomial in two variables
Why this particular form?
Sep
17
comment Does this simple inequality have a name?
@DavidHandelman Can you please elaborate a bit? 10x!
Sep
17
comment Does this simple inequality have a name?
Irinically, my original overwrought proof used the Gruss inequality - which is a complement to Chebyshev. So it all comes together. :)
Sep
17
revised Does this simple inequality have a name?
edited title