968 reputation
815
bio website thomas-kahle.de
location Magdeburg, Germany
age 32
visits member for 4 years, 4 months
seen 22 hours ago

I'm working in Magdeburg, Germany.


Aug
5
comment Software tools for medium-scale systems of polynomial equations
Oh, sorry. I did not see that you worked with the actual problem (because I did not see that it was linked). I was wondering where you numbers came from... :)
Aug
5
comment Software tools for medium-scale systems of polynomial equations
In this case it looks like it will use a general SQP approach, then. I somehow doubt that it will take only a few seconds to find a reasonable approximation to a global minimum of a long sum of squares in 12 variables, but I have not used Maple in a couple of years...
Aug
5
revised Software tools for medium-scale systems of polynomial equations
slight extension to highlight difference between solving and SDP.
Aug
5
comment Software tools for medium-scale systems of polynomial equations
What is Maple doing internally? For an arbitrary function, random search for a minimum is as good as any other method, so is it using random search?
Aug
3
answered Software tools for medium-scale systems of polynomial equations
Jul
21
comment polynomial 0,1 integer programming
What are the $J_i$? Can you give some background?
Jul
2
awarded  Curious
Apr
20
awarded  Yearling
Apr
15
comment Variety of commutative semi group
@J.-E.Pin You are right, I have no idea what the difference between an identity and a relation may be in the context here.
Apr
15
comment Variety of commutative semi group
Judging from the result that you expect, I'm suspecting that you are after the variety of a commutative semigroup ring? Maybe one that satisfies $x_i^2 = x_i^3$ for each indeterminate $x_i$? Please rework this questions, at the moment it makes no sense.
Apr
6
awarded  Popular Question
Oct
7
awarded  Constituent
Sep
30
awarded  Caucus
Sep
28
awarded  Informed
Sep
28
revised vertex independent set and the maximal clique
formatting
Sep
28
suggested suggested edit on vertex independent set and the maximal clique
Sep
28
comment How do you not forget old math?
I agree, and you explained it better than I did.
Sep
28
revised How do you not forget old math?
improve wording
Sep
27
answered How do you not forget old math?
Sep
4
comment Is an ideal generated by multilinear, irreducible, homogeneous polynomials of different degrees always radical?
Now let me get the math.se bounty :)