4,676 reputation
11244
bio website math.haifa.ac.il/~seva
location Israel
age 51
visits member for 3 years, 6 months
seen 28 mins ago
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Apr
17
comment Characterizing and counting boolean functions with all influences 1/2
Just a translation into the plain language of abelian groups: we are seeking to classify / count subsets $A\subset{\mathbb F}_2^n$ such that each one of the $n$ coordinate vectors has exactly $|A|-2^{n-2}$ representations as a sum of two elements of $A$.
Apr
17
comment Cover one finite subset of integers by another one
The standard Ruzsa covering lemma says that $B$ can be covered by at most $|B-A|/|A|$ translates of the set $A-A$. I am pretty sure that you cannot replace here $A-A$ with $A$, although I cannot think of a counterexample off the top of my head.
Apr
17
reviewed Approve suggested edit on Advice for number theory library
Apr
15
revised Symmetric matrices with $\rho(A)\gg\|A\|_\infty$
Tag edit, the extreme special case $\|A\|=\|A\|_\infty$ is discussed.
Apr
12
revised Symmetric matrices with $\rho(A)\gg\|A\|_\infty$
Tags added, two particular cases mentioned, minor formatting
Apr
11
asked Symmetric matrices with $\rho(A)\gg\|A\|_\infty$
Mar
31
awarded  Nice Answer
Mar
31
awarded  co.combinatorics
Mar
30
awarded  Revival
Mar
30
answered Looking for a paper of Kemperman on semigroups
Mar
28
awarded  Enlightened
Mar
28
awarded  Nice Answer
Mar
28
revised Consecutive non-quadratic residues
A general clean-up, extensions mentioned
Mar
28
comment Disconnecting a three regular graph
@Gerry: I voted to close because I absolutely cannot understand the question. Certainly, if you remove enough edges from any graph, this will disconnect it - but how is this related to probability and 3-regularity? What does it mean "if I disconnect a graph, I get a subgraph"? What is the exact meaning of the sentence that follows?
Mar
25
revised Consecutive non-quadratic residues
added 575 characters in body
Mar
25
awarded  Citizen Patrol
Mar
24
comment Consecutive non-quadratic residues
@GH: fixed, thanks!
Mar
24
revised Consecutive non-quadratic residues
More typos fixed
Mar
24
revised Consecutive non-quadratic residues
added 46 characters in body
Mar
24
accepted The height of the Perron-Frobenius eigenvector