7,957 reputation
1338
bio website mertig.com
location Berlin, Germany
age
visits member for 2 years, 7 months
seen 7 hours ago

Being a trained physicist I learned Mathematica while developing FeynCalc. Since then I am stuck with Matheamtica. I do like some other programming languages like Fortran and Java.

I have my own company, GluonVision GmbH, in Berlin, doing mostly (web)Mathematica related consulting and projects.

Lately I became more and more insterested in CDF.

My Email is: Uncompress["1:ejxttmopcuznygaoys9jc8hnlsrjtndlzs8fafppb48="]


1d
awarded  Nice Answer
Aug
28
comment Is garbage collection broken in version 10.0.0?
The interesting question is if 10.0.0 is more buggy than 9.0.0 was. I rarely use 10.0.0. Both kernel and FrontEnd are inferior to 9.0.1 (where comparable). Of course there are some exciting new features in 10, but I just wait for 10.0.1
Aug
24
comment Find file names in directory
maybe a permission issue?
Aug
23
answered Find file names in directory
Aug
18
awarded  Nice Answer
Aug
16
awarded  Good Question
Aug
15
awarded  Good Question
Aug
14
awarded  Custodian
Aug
14
reviewed Approve suggested edit on Is there any way to automatically evaluate selection in new window or new notebook?
Aug
13
awarded  Nice Question
Aug
13
comment Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
I also saw 70% under Linux. So maybe it is some of the external libraries (MKL?).
Aug
13
asked Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
Jul
22
comment How to make use of Associations?
Your example mentioned on Hacker News does not quite work on a fresh Mathematica 10.0.0 session on Windows (it does on Linux): Executing titanic = ExampleData[{"Dataset", "Titanic"}];titanic[Histogram, "age"] produces Failure[ ...]. Only titanic = ExampleData[{"Dataset", "Titanic"}]; titanic[#, "age"] &@Histogram or any other previous mentioning (autoloading) of Histogram works. Sometimes I wonder why WRI releases beta versions as .0.0 releases.
Jul
22
comment Is it possible to close Windows Explorer from within Mathematica
Run["taskkill /IM explorer.exe /F"]; Import["!explorer.exe", "Text"]; but the kernel then hangs ...
Jul
16
comment Version 10 of Mathematica in Windows XP
@Vaggelis_Z I don't work for Wolfram. Maybe somebody from Wolfram Research knows why they stopped support for Windows XP. My uneducated guess is that the cloud functionality (login , etc) is impossible to support.
Jul
16
comment Version 10 of Mathematica in Windows XP
wolfram.com/mathematica/system-requirements.html
Jun
18
comment More efficient implementation for comparing coefficient lists in a Do-loop
This needs about 10 seconds: AbsoluteTiming[f[n_, q_] := f[n, q] = Expand[Sum[FunctionExpand[QBinomial[n, j, q]]*q^j^2, {j, 0, n}]]; lhs[n_, q_] := lhs[n, q] = Sum[(-1)^j*q^(j*((5*j + 1)/2)), {j, -n, n}]; rhs32[q_, a_, b_, c_, d_, e_, g_, h_] := Expand[q^a - f[1, q]*q^b*Product[1 - q^i, {i, c, d}] + f[2, q]*q^e*Product[1 - q^i, {i, g, h}]]; list = Flatten[ParallelTable[{{a, b, c, d, e, g, h}, rhs32[2, a, b, c, d, e, g, h]}, {a, 0, 15}, {b, 0, 15}, {c, 1, 5}, {d, c, 5}, {e, 0, 15}, {g, 1, 5}, {h, g, 5}], 6]; pmatch = Select[list, #1[[2]] == lhs[2, 2] & ]]
Jun
8
awarded  Notable Question
Jun
6
awarded  Enlightened
Jun
6
awarded  Nice Answer