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.

1h
comment Real points of zero-dimensional real algebraic varieties
Are there bounds on the degrees of these polynomials?
2h
reviewed Approve suggested edit on Reference request: Invariant sets of dynamical systems
1d
reviewed Approve suggested edit on Does $ \text{mult}(R / I) = d_{1} \cdots d_{r} $ imply that $ (f_{1},\ldots,f_{r}) $ is an $ R $-regular sequence?
1d
comment is there an analogy between fractals and automorphic forms?
You might be interested in the book "Indras Pearls" about authomorphism-groups, Kleinian groups, and fractals.
2d
revised Separating points in the plane II
language
2d
reviewed Approve suggested edit on Testing whether an integer is the sum of two squares
Oct
18
comment A good book on adeles and ideles
I think the answer might be ... rolling in the deep.
Oct
17
comment Shift-invariant symmetric functions in representation theory?
Is there then a corresponding notion of Schur functions for these Lie algebras?
Oct
17
comment quadratic knacksack problem, state of art
This is probably better asked in theoretical computer science...
Oct
17
comment Discriminant of a polynomial in two variables
I am not sure there is a general formula for the one-variable case, that is explicit in the coefficients (there is of course the determinant version).
Oct
17
comment Java multithreaded rendering, how to optimize
Added link to relevant source code.
Oct
17
revised Java multithreaded rendering, how to optimize
added link to source
Oct
17
revised Rep-tiles of order 2
added 213 characters in body
Oct
17
answered Rep-tiles of order 2
Oct
17
reviewed Approve suggested edit on On a problem of Berkovich
Oct
17
comment Shift-invariant symmetric functions in representation theory?
Is there some reference that treats this?
Oct
17
revised An inequality for the ratio of standard Young tableau with {1,2,...,k} in the first row
fixed math error
Oct
17
accepted Parse XML with SAX in java, case insensitive.
Oct
17
asked Shift-invariant symmetric functions in representation theory?
Oct
17
awarded Popular Question
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