2,580 reputation
1821
bio website users.jyu.fi/~tamaraja
location Finland
age 32
visits member for 4 years
seen yesterday

At the University of Jyväskylä working on different topics in geometric measure theory and geometric function theory.


Oct
8
comment Interior cone condition preserved on a small perturbation of the domain.
@BeniBogosel With the definition you gave, the question of the OP should have a quite immediate positive answer. This is because having a fixed direction for the cone inside the ball says that the boundary is a graph of a Lipschitz function there. The boundedness of $\Omega$ says that the boundary is compact and hence a finite union of Lipschitz graphs.
Aug
24
comment A family Mersenne composite numbers?
@joro No typo there. Any prime factor is of the form $k*2m+1$. I calculated $2^m \mod p$ with all primes of that form for $k$ up to $2^{28}$.
Aug
24
comment A family Mersenne composite numbers?
I did a tiny amount of trial factoring: any prime factor of $2^m-1$ with $t=71$ is larger than $2^{172}$.
Aug
24
comment A family Mersenne composite numbers?
$4*2^w+w$ is prime (or at least prp) for $w=141,411,5495,6647,7427,7889,14565,17933,...$
Aug
22
comment boundary density of the Von Koch flake
If you consider the Jordan curve case and assume that the iterated function system that produces the boundary (locally) satisfies the open set condition, then the boundary has positive Hausdorff measure with the similitude dimension and the iterated open sets in the OSC contain at least a fixed portion (in Lebesgue measure) of the set $K$ in comparison to the measure of the open set. Thus for small $r$ the quantity $f_r(x)$ is uniformly bounded below by a positive constant and the integral you consider is positive.
Aug
21
answered boundary density of the Von Koch flake
Aug
7
answered On a.e. approximate differentiability of certain continuous real functions
May
21
comment Can we obtain topology results using analysis in metric measures spaces?
The proof for Bonnet-Myers you can find from the second paper by Sturm, for instance. Gigli might visit all such results during the course (depending how long the course is). If you want to read the basic stuff by yourself, I would suggest Villani's book: Optimal transport, old and new. Luckily it is freely available online cedricvillani.org/wp-content/uploads/2012/08/preprint-1.pdf
May
21
comment Can we obtain topology results using analysis in metric measures spaces?
It is not so easy to answer your question. We do have Bonnet-Myers in CD(K,N) spaces, but here the convexity-type condition is using the Rényi entropy and not the Shannon entropy.
May
21
comment Can we obtain topology results using analysis in metric measures spaces?
Have you read the papers by Sturm dx.doi.org/10.1007/s11511-006-0002-8 dx.doi.org/10.1007/s11511-006-0003-7 and by Lott and Villani dx.doi.org/10.4007/annals.2009.169.903 ?
May
16
answered PDE-Based Triangle Inequality for Optimal Transportation
May
15
awarded  Popular Question
Apr
23
comment Modulus of of continuity of a convolution operator with respect to Wasserstein metric
I added a way to see the reverse inequality. I'll think about your followup question later when I have more time.
Apr
23
revised Modulus of of continuity of a convolution operator with respect to Wasserstein metric
added 489 characters in body
Apr
9
answered Modulus of of continuity of a convolution operator with respect to Wasserstein metric
Mar
26
reviewed Approve Is there an interesting species whose generating function gives the zigzag numbers?
Jan
4
reviewed No Action Needed Submission of papers to ArXiv or similar
Dec
20
awarded  Yearling
Dec
8
reviewed No Action Needed What kind of probability distribution maximizes the average distance between two points?
Dec
5
reviewed Approve Proving that Brownian motion has no points of increase