16,590 reputation
13372
bio website ilorentz.org/beenakker
location Leiden, The Netherlands
age
visits member for 3 years, 7 months
seen 12 hours ago
physicist at Leiden University

2d
awarded  Nice Answer
Jul
16
awarded  Necromancer
Jul
13
comment Integer Solutions To Linear Equation
khanacademy.org/math/arithmetic/fractions/Equivalent_fractions/…
Jul
13
comment numerical solution of volterra integral equation
math.bu.edu/people/isaacson/hpspec_volt.pdf
Jul
10
comment Laurent expansion of a principal value integral
you're right, it fails; I'll leave the answer for the record, but have made it CW to avoid more rep.
Jul
9
revised Laurent expansion of a principal value integral
added 30 characters in body
Jul
9
revised Laurent expansion of a principal value integral
deleted 20 characters in body
Jul
9
revised Laurent expansion of a principal value integral
added 60 characters in body
Jul
9
revised Laurent expansion of a principal value integral
added 67 characters in body
Jul
9
revised Laurent expansion of a principal value integral
added 1031 characters in body
Jul
9
revised Laurent expansion of a principal value integral
added 1031 characters in body
Jul
9
answered Laurent expansion of a principal value integral
Jul
6
revised Evaluate an integral or Fourier coefficients
deleted 103 characters in body
Jul
6
answered Evaluate an integral or Fourier coefficients
Jul
6
comment Solving $T^2 = -\kappa\, \mathrm{Tr}\, (\log(e^{i T \hat{H}_0} \hat{O}) )^2$ equation
@VítTuček --- if $H_0$ and $O$ commute, the trace depends only on the $N$ eigenvalues of each of these two matrices; once you abandon that, the eigenvectors enter as well so knowing the spectra of $H_0$ and $O$ will not suffice.
Jul
5
comment Solving $T^2 = -\kappa\, \mathrm{Tr}\, (\log(e^{i T \hat{H}_0} \hat{O}) )^2$ equation
you want a closed form solution without specifying $H_0$ and $O$? not much hope for that...
Jul
5
comment Integral of Bessel function of 1st kind with complex exponential
? solution ? I don't see much reason to hope for some simple closed form expression.
Jul
5
awarded  Nice Answer
Jul
4
answered Mathematicians who made important contributions outside their own field?
Jul
3
comment Reference request: modern proof of the recognition principle
mathoverflow.net/questions/47335/recognition-principle