8,890 reputation
1643
bio website gluonvision.com
location Berlin, Germany
age
visits member for 3 years, 2 months
seen 38 mins ago

Being a trained physicist I learned Mathematica while developing FeynCalc in 1990. Since then I am stuck with Matheamtica. I do like some other programming languages like Fortran and Java.

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

Lately I became more and more insterested in CDF projects.

My contact info is here


4h
comment Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
@Mr.Wizard How much do you have to pay for the upgrade? I sponsor you if it is not too much.
4h
answered Set fontsize using setoptions not working in DateListPlot
12h
awarded  Popular Question
13h
comment How can I get the style of a CellObject?
sure. How do I escape a quote in comments?
14h
comment How can I get the style of a CellObject?
not exactly ...
14h
comment How can I get the style of a CellObject?
Nice discovery. To clarify: ``Experimental```CellStyleNames@Cells[nb] works, i.e., directly on the CellObjects. So getCellStyles = Experimental`CellStyleNames
1d
revised Dialog-type notebook
deleted 1 character in body
1d
comment How can I translate ExpIntegralEi (Mathematica function) in Matlab?
expint(X). Not knowing Matlab very well it took me 2 minutes to find this, and comparing to this, things are obvious.
1d
comment Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
@DanielLichtblau So, this simple example is fixed, nice, but my real applications (involving numerics with FindMinimum and alike) are still about 10-20% slower than 9.0.1. May I hope for a 10.2? Like there was a good 4.2 and 5.2 a long time ago.
2d
revised Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
added 103 characters in body
2d
revised Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
added 92 characters in body
2d
answered Expansion of a hypergeometric function takes ages with Mathematica 9 and 10 (regression?)
Mar
29
revised Inconsistent behavior of undocumented Encode->Import->StringToStream->Get on password-locked stream
Grammar
Mar
29
revised Inconsistent behavior of undocumented Encode->Import->StringToStream->Get on password-locked stream
added 8 characters in body
Mar
26
comment Simplified expression is different than original
@LeastSquare Why don't you use a package, like this one
Mar
26
comment Simplified expression is different than original
@LeastSquare what is vv? In Simplify[Eqs] there is no vv, however in your first long expression there is
Mar
24
comment Converting between AbsoluteTime and Unix time
Keep in mind that AbsoluteTime[] ignores leap seconds. I think this fact is missing in the documentation.
Mar
18
comment Interfaces: Importing files, processing them and exporting the results
Minor remark: I would use FileExistsQ[filename] instead of filename =!= $Canceled && filename =!= $Failed
Mar
18
comment Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
Will the FE crash less? (if you use the FE at all, that is ...)
Mar
18
comment Is this 30% slowdown in Mathematica 10 due to DownValues lookup time?
@DanielLichtblau And, will this be fixed in 10.1? This is not an academic example. In real world applications I have slowdowns of 10 - 20%. This is annoying.