843 reputation
313
bio website www2.math.su.se/~per
location Zurich, Switzerland
age 27
visits member for 2 years, 10 months
seen yesterday

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.


Dec
15
comment how to get continuation of square matrices with periodic diagonal band automatically?
This is quite a complex task, unless you specify what exact type of continuations you mean... You say periodic, so I would guess start by writing a peroid-finding function for lists...
Dec
15
comment Unable to compute the area of region
Hm, why do you write the numbers as strings?
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