Per Alexandersson

Zurich, Switzerland

www2.math.su.se/~per

Age: 27

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.

1d
comment Tiling with restricted overlap
Ah, I suspected that there was such an example! Thank you very much for this!
1d
comment Why doesn't Python have a "flatten" function for lists?
It is built-in in Mathemaica, and I use it extensively.
1d
asked Tiling with restricted overlap
2d
comment Certain signed sum over $S_n$
That is a very nice observation!
2d
comment Certain signed sum over $S_n$
Ah, nice! I had a feeling there was some counterexample. The case I was studying in particular, only concerns certain subgroups. Perhaps the statement is true for these, see my edit...
2d
revised Certain signed sum over $S_n$
added 180 characters in body
2d
comment Certain signed sum over $S_n$
Exactly, the capital G's are fixed, the sum is over all triplets in $G_1 \times G_2 \times G_3$ with the extra condition that the product of the elements is the identity.
2d
asked Certain signed sum over $S_n$
2d
reviewed Approve suggested edit on Is there a good version of Artin-Wedderburn for semisimple algebra objects?
Jan
24
comment paradox about the Axiom of Choice?
Have you checked wikipedia? Banach-Tarski paradox?
Jan
4
comment Arithmetic Progression
A bit more background? This is worded as homework...
Jan
1
comment How can I help a child stay motivated in learning to program?
Hmm, just forbid it, and they will be immensely interested in the topic.
Jan
1
reviewed Approve suggested edit on Foliation with leaves which are and are not dense
Dec
30
reviewed Approve suggested edit on How do we show this matrix has full rank?
Dec
30
comment Is $n = p-q$ equivalent to Goldbach's Conjecture?
There is a small section about these two conjectures in "Gödel, Escher Bach ..." by Hofstadter, (a book every mathematician should read, or at least know about, IMHO.
Dec
28
reviewed Approve suggested edit on Subset of the plane that intersects every line exactly twice
Dec
25
awarded Good Question
Dec
25
reviewed Approve suggested edit on Why is $ \frac{\pi^2}{12}=\ln(2)$ not true?
Dec
24
awarded Autobiographer
Dec
24
reviewed Approve suggested edit on Automorphism theorem
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