833 reputation
313
bio website www2.math.su.se/~per
location Zurich, Switzerland
age 27
visits member for 2 years, 9 months
seen Nov 19 at 8:54

Currently interested in Schur functions and semistandard Young tableaux and misc. related representation theory and combinatorics.

Phd thesis defended 2013, titled Combinatorial Methods in Complex Analysis.

I keep an eye out for interesting results related to complex dynamics, computability, and computer-assisted research. I use Mathematica extensively in my research. My other main programming languages are Java, LaTeX, PHP, C, etc.


Oct
26
answered Summing over n variables
Oct
7
comment Problem with Classify Documentation Center page
That's pretty neat :)
Oct
4
comment Correct way to use memoization for recurrence relation having an Integral
Is there an explanation why OP:s code does not work, and this does?
Oct
3
comment Correct way to use memoization for recurrence relation having an Integral
Even without memoization, I get the 1/12-answer, so memoization is not the issue, it seems.
Sep
30
comment Dropbox datastore
I was more thinking along the line of memoization, but storing computed things in the database also. Thing is, if I run a batch for computing a large set of polynomials, say, and the kernel crashes, all partial results are lost. If I append to a raw file, the file handler is still open, so there might be data loss. Besides, I think import/export on EVERY new result computed, is a bit tough on the hard-drive (and also slows down the computation immensely), although I suppose writing to a remote location is even slower...
Sep
29
comment Dropbox datastore
Of course it has it built-in, haha. Too bad my office only have V9. But the dropbox API is different from the Mathematica functions, which only work with files...
Sep
29
asked Dropbox datastore
Aug
8
comment How can I use the Klingon alphabet symbols?
@Mr.Wizard: Well, I play around a lot with Schur polynomials, which are characters of GLn, and also irreducible characters of Sn. In general, I would like access to structure constants, such as Littlewood-Richardson coefficients, Kostka coefficients and Kronecker coefficients. My question about generating Gelfand-Tsetlin patterns on this site can be used to compute Kostka numbers, for example. LR-coefficients can be computed by counting lattice points in polytopes, another thing I really think Mathematica could be better at.
Aug
8
comment How can I use the Klingon alphabet symbols?
Ok, so you are telling me, that the MATHEMATICAL software supports Klingon characters, but not irreducible characters...
Aug
7
comment $SU(4)$ Structure constants in mathematica
Mathematica is perhaps not the best software for the task; i think there are better suited programs out there tat has these built-in.
Jul
2
awarded  Curious
Jun
16
comment Smooth Peter de Jong attractor
@Kuba: The implementation I have is written in Java, and is open-sourced here: sourceforge.net/projects/flamethyst Some images created can be found here: people.su.se/~peal0658/index.php?page=fractals
Jun
16
comment Smooth Peter de Jong attractor
Google "Flame fractals". I create this type of fractals a lot; 10⁵ is not nearly enough iterations. You would like about 2000 iterations PER PIXEL in the final image to get a decent result.
Jun
14
comment Extract memoized results in the form of a rule
Ah, yes, of course! I feel silly now.
Jun
14
asked Extract memoized results in the form of a rule
Jun
10
comment State “i” goes to state “j”
I would guess it means states accessible from either 1 or 4.
May
8
comment Mathematica sporadically crashes on open
Because, that makes sense... sometimes, one wonders...
May
8
answered Drop last element of parts of a list
Mar
30
answered Do multiple instances of Mathematica run completely independently?
Mar
28
awarded  Nice Answer