bio  website  ilorentz.org/beenakker 

location  Leiden, The Netherlands  
age  
visits  member for  4 years, 6 months 
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physicist at Leiden University
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revised 
Are symplectic methods used in (classical) Economics?
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answered  Are symplectic methods used in (classical) Economics? 
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Helly's theorem in other areas of mathematics
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Helly's theorem in other areas of mathematics
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Helly's theorem in other areas of mathematics
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answered  Helly's theorem in other areas of mathematics 
May 26 
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Limiting absorption principle
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May 26 
answered  Limiting absorption principle 
May 26 
comment 
Cartopolar curve
math.stackexchange.com/questions/1299183/cartopolarcurve 
May 24 
comment 
Algorithm to generate a (pseudo) random highdimensional function
indeed it does... 
May 24 
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Algorithm to generate a (pseudo) random highdimensional function
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May 24 
answered  Algorithm to generate a (pseudo) random highdimensional function 
May 23 
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Any reference in absorbing boundary conditions for nonabelian gauge fields?
iopscience.iop.org/13672630/10/4/045022/pdf/njp8_4_045022.pdf 
May 21 
comment 
Find the expansion of the exact solution (beyond Taylor)
it's really simple: give the whole expression to Mathematica, substitute $\beta=\beta'\epsilon$, $\alpha=\alpha'/\epsilon$, and ask Mathematica to expand in powers of $\epsilon$ to second order; and you'll get the desired result. You expand to second order because there are no terms of lower order. 
May 21 
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Find the expansion of the exact solution (beyond Taylor)
@BrendanMcKay  expanding around the minimum makes sense, but will not give the formula desired by the OP; for that the limit $\mu\rightarrow 0$, $S\rightarrow\infty$ at fixed $\mu^3 S^2$ is needed. 
May 21 
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Find the expansion of the exact solution (beyond Taylor)
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May 20 
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Find the expansion of the exact solution (beyond Taylor)
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May 20 
answered  Find the expansion of the exact solution (beyond Taylor) 
May 20 
awarded  Revival 
May 20 
comment 
Find the expansion of the exact solution (beyond Taylor)
indeed, this is a mistake, S goes to infinity, not to zero, otherwise you cannot have $S\mu$ of order unity and $S\mu^2$ small (in other words, $\mu$ is of order $1/S$). 