bio  website  thomaskahle.de 

location  Magdeburg, Germany  
age  33  
visits  member for  5 years, 1 month 
seen  14 hours ago  
stats  profile views  944 
I'm working in Magdeburg, Germany.
14h

awarded  Yearling 
May 20 
revised 
Formulating conditional constraints in optimization
Reformulate so that the problem has a chance to be accepted. 
May 20 
comment 
Formulating conditional constraints in optimization
Welcome to mathoverflow, by the way. Please make sure to proofread your question, use math environments, and formulate it so that it is enticing for research mathematicians. 
May 20 
suggested  approved edit on Formulating conditional constraints in optimization 
Aug 5 
comment 
Software tools for mediumscale 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 mediumscale 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 mediumscale systems of polynomial equations
slight extension to highlight difference between solving and SDP. 
Aug 5 
comment 
Software tools for mediumscale 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 mediumscale systems of polynomial equations 
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  approved 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. 