# Szabolcs

 10h comment Getting the most out of FullSimplify[]Your input is technically syntactically correct, but are you sure it means what you think it means? This is not a proper mathematical formula in Mathematica, so FullSimplify won't be able to do anything reasonable with it. 10h comment How to type binomial coefficient \$\binom{n}{k}\$Here's a paste button: ```PasteButton[ RawBoxes@TemplateBox[{"\[SelectionPlaceholder]", "\[SelectionPlaceholder]"}, "Binomial"]]```. You could update your answer with it. 10h comment How to type binomial coefficient \$\binom{n}{k}\$Here's a reason not to force these things. There's a difference between those two inputs but you can't see it. The first one was created by transforming the cell to TraditionalForm. The second one was input directly as a visual form. 11h comment How to type binomial coefficient \$\binom{n}{k}\$What exactly are you trying to achieve? (1) Just display something? (2) Interpret that displayed form as `Binomial`? (3) Or display `Binomial` in that form? TraditionalForm will do (3). Use Ron's answer for (1). (2) is not simple and I don't recommend it. When talking to computers it's best to stick to a clear, unambiguous notation (which the usual math notation is not---it always relies on a human reader who understands the problem and the context). 11h awarded Nice Answer 13h comment What is the default ColorFunction for Image3D?I feel stupid now. I never noticed that! 13h accepted What is the default ColorFunction for Image3D? 18h comment Will I be able to use NDSolve, and then how@yankeefan11 Please look up ParametricPlot3D in the docs. 18h revised What is the default ColorFunction for Image3D?added 51 characters in body 18h revised How do I plot the surface of a 4D plot?added 233 characters in body 18h asked What is the default ColorFunction for Image3D? 19h revised StreamPlot,smooth curvesadded 56 characters in body 19h comment Why the same program runs faster on an older computer?Also, try to use timethis instead and make sure your code runs for at least several seconds, otherwise the benchmark may be inaccurate!! 19h comment Why the same program runs faster on an older computer?Try to get rid of most things that will call operating system functions, and stick to strictly numerical code (I assume that's what your program does). In particular, remove all I/O functions (`printf`, `cout`, etc.) This should minimize the dependence on your OS version and truly compare the CPUs. (Though the truth is that there are some surprising things that depend on system functions...---I had a similar problem where the same, seemingly purely numerical code ran much faster on Linux than Win) 19h answered How do I plot the surface of a 4D plot? 20h comment Function incomplete when plottingI can't reproduce the problem you mention but `Chop` is the usual way to get rid of those imaginary zeros. 20h comment Function incomplete when plotting`VoigtDistribution` is a built-in symbol in version 9 and it's better not to try to redefine it. Generally, just avoid using any names starting with capital letters. That guaranteed to avoid conflict with all packages and builtins in current and future versions. 1d awarded Nice Question Dec 2 comment Import DCD (CHARMM/NAMD binary trajectory) fileYou should host this at a more suitable place, such as GitHub. Very useful package, works as advertised! Dec 2 comment Schengen visa holder issued by the Italian embassy - getting into Romania via Frankfurt?Ultimately what is going to matter is the decision of the border officer, who might know surprisingly little about the actual regulations (!!!), so I strongly recommend printing out the regulations (linked by Doc), both in Romanian and English, and taking them with you!