bio  website  front.math.ucdavis.edu/author/… 

location  New York City  
age  43  
visits  member for  5 years 
seen  Oct 16 at 16:02  
stats  profile views  4,328 
Research: additive number theory; combinatorial number theory.
Faculty at City University of New York, at the Staten Island and Graduate Center campuses.
1d

awarded  Yearling 
Oct 17 
awarded  Good Question 
Oct 16 
comment 
Computer Algebra Errors
That's a great article! 
Sep 30 
awarded  Explainer 
Sep 23 
comment 
List of integers without any arithmetic progression of n terms
Uh, yep, $f(2)=3$. I did $f(3)$ on my fingers, too, so no promises... 
Sep 23 
comment 
List of integers without any arithmetic progression of n terms
$f(1)=1$, $f(2)=4$, $f(3)=4$. Do you have some more numbers to report? 
Sep 23 
awarded  Necromancer 
Aug 28 
comment 
What is your favorite “strange” function?
It is definitely discontinuous at rational points. At $p/q$ the difference between the limit from the left and from the right is $1/(2^q1)$, which is definitely not 0. It is differentiable at irrational $x$, and moreover its derivative is 0 whenever it has one! 
Jul 31 
awarded  Enlightened 
Jul 31 
awarded  Nice Answer 
Jul 17 
comment 
Computer Algebra Errors
I just asked Mathematica 10 to "Integrate[ Abs[Exp[2Pi I x]+Exp[2Pi I y]], {x,0,1}, {y,0,1}]", and after some thought it returned the expression unevaluated. 
Jul 2 
awarded  Curious 
Jun 14 
comment 
Enumeration of a finite group
Are there any groups you can confirm have, or don't have, such enumerations? 
Mar 27 
awarded  Nice Answer 
Mar 22 
comment 
partial sums of fractional parts
Isn't $S(28,18,1/2) = 336/23$, considerably larger than your numerics suggest? 
Mar 22 
comment 
partial sums of fractional parts
Just to be clear, typically $S(p,q,\alpha)$ is negative, and can be arbitrarily negative, you just want to bound how positive it can become? 
Jan 9 
awarded  Notable Question 
Dec 13 
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Expected symmetry in the diophantine approximations of an irrational number
Do you have a proof that there are no upper ones? I think defining $x$ through its continued fraction may be more tractable, say $x=[0;10,1,100,1,1000,1,\dots]$. 
Nov 10 
comment 
Most interesting mathematics mistake?
That's what I had in mind, sorry for the confusion. But in my defense, can't circles on the surface of a torus have 4 intersections? And $p$adic circles have infinitely many? 
Nov 2 
awarded  Famous Question 