18,201 reputation
13674
bio website ilorentz.org/beenakker
location Leiden, The Netherlands
age
visits member for 3 years, 9 months
seen 6 mins ago
physicist at Leiden University

26m
comment Computer Algebra Errors
mathematica.stackexchange.com/questions/58940/… (designated as a bug by one of the Wolfram developers)
7h
comment same paper was published in the same journal twice
I took a look: the two papers have the same content, but are not identical: one has the acknowledgement following the introduction, the other at the end; (this difference is also responsible for the different page length noted by @WłodzimierzHolsztyński ); so it seems the publisher was confused about whether this paper had already been copy-edited, and it went through the work flow twice; page proofs to the authors should have caught this duplication, but apparently did not.
16h
comment What is quantum Brownian motion?
added some more viewpoints beyond random walks.
17h
revised What is quantum Brownian motion?
added 1043 characters in body
20h
revised What is quantum Brownian motion?
deleted 5 characters in body
20h
revised What is quantum Brownian motion?
deleted 14 characters in body
22h
revised What is quantum Brownian motion?
added 31 characters in body
22h
revised What is quantum Brownian motion?
added 1050 characters in body
23h
revised What is quantum Brownian motion?
added 25 characters in body
23h
answered What is quantum Brownian motion?
1d
awarded  Reviewer
1d
reviewed Close graphical estimate of convergence rates [looking for textbook reference]
1d
revised Hilbert's Hotel
latex, Wohnungsnot.
1d
reviewed Edit suggested edit on Gradient of the energy functional in $H^{1,2}$-norm
1d
revised Gradient of the energy functional in $H^{1,2}$-norm
Formula didn't display correctly.
1d
reviewed Close Square filling self avoiding walk
1d
reviewed Close Are major arcs always around a fraction with small denominator?
1d
awarded  Good Answer
1d
comment Which is the right way to compute the Approximate Entropy (ApEn)?
the two definitions differ by terms of order variance/mean$^2$, which is small for a relatively narrow distribution
1d
revised Which is the right way to compute the Approximate Entropy (ApEn)?
added 405 characters in body