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13h

comment 
Asymmetric random walk on the line with barriers
One simple observation is that if the distribution is supported on $\mathbb{N} \cup \lbrace 1 \rbrace$ then it can't be an example, since there would never be any overshoot in the negative direction yet asymmetric distributions would have some positive overshooting. Similarly, the distribution has to include a positive probability of taking a positive step of size at least $2$. 
19h

comment 
A possibly surprising appearance of Lucas numbers
Instead of using $x$ or $r$, why not just use $\sqrt{2}$ everywhere? 
1d

comment 
Genus of Covering Space of 3Manifold
See mathoverflow.net/questions/86800/…. 
Jan 24 
comment 
optimal strategies for 2player zerosum games of perfect information
Are you asking for something other than Zermelo's theorem? 
Jan 23 
answered  Is mean width a Dehn invariant? 
Jan 20 
awarded  Enlightened 
Jan 20 
awarded  Nice Answer 
Jan 17 
comment 
Bayes with nonparametric data
There is no problem with using Bayesian techniques with lognormal data. That's still parametric in a different family. It sounds like you are asking whether something might go wrong if you use the wrong model. Of course the answer to that is yes, but sometimes you don't expect any noticeable differences. 
Jan 16 
comment 
Does bounding moments make distributions close in total variation distance?
@Bullmoose: One possibility would be to impose conditions such as that the density is unimodal. Another is to look at a different distance than the total variation distance. 
Jan 16 
answered  Does bounding moments make distributions close in total variation distance? 
Jan 16 
awarded  Necromancer 
Jan 13 
comment 
Probability that top k elements will be got?
Variations of this have been asked before with Gaussian noise, no delta mass at the original values, and original values not in an arithmetic progression. I don't know that there is any simple answer, but how attached are you to this particular model? If there is no complete formula for everything, then you might need to focus on some part of the range of values. Which region is of particular interest? 
Jan 11 
answered  How to roll a $p$ 
Jan 9 
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covering high dimensional hypercube by balls
@usul: For $r=1$ it only makes a difference in low dimensions. 
Jan 9 
comment 
covering high dimensional hypercube by balls
@usul: That lower bound (for $r=1$ before the OP changed the radius to be arbitrary) is not correct for the version where the centers can be arbitrary. If $d=3$ and $r=1$, all corners of the cube are contained in a unit sphere centered at the center of the cube. 
Jan 8 
comment 
covering high dimensional hypercube by balls
I would be surprised if the case of arbitrary centers has been studied much. 
Jan 8 
comment 
covering high dimensional hypercube by balls
Are you letting the centers of the balls be points other than vertices? The corners of a square are contained in a unit ball around the center but not any vertex. 
Jan 8 
comment 
How large must $A$ be if $\{1, \ldots, N\} \subseteq AA$?
Allowing negative numbers is unimportant because you can translate $A$. 
Jan 4 
comment 
PDF of th product of normal and cauchy distributions
Are these centered? 
Jan 3 
awarded  Yearling 