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14

Running FullSimplify I get FullSimplify[z Conjugate[z] + 2 Abs[z]^2] 3 z Conjugate[z] This is actually more simple than 3 Abs[z]^2 in the eyes of FullSimplify. See here for more info. SimplifySimplifyCount[3 z Conjugate[z]] 5 SimplifySimplifyCount[3 Abs[z]^2] 6 Luckily there are many ways to guide FullSimplify. Here is one such way. ...

0

OK I think I got it. The final LeviCivita[] that remains has (of course) only Momentum[] as indices. In my case (as in most other cases) four-momentum conservation implies $$\tag{2} k+p = l+q$$ and I've got something like $$\tag{3}\epsilon^{klpq}.$$ Now substituting e.g. $k = l+q-p$ and EpsEvaluate[] the LeviCivita I get zero which is what I was looking ...

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I am the developer of WildCats. A new version with some "limit" functionality and a palette is almost ready and should be available soon (in a few weeks at most). In the meantime your feedback and suggestions are always appreciated.

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The "standard" way to install FeynArts+FormCalc on OSX or Linux would be to use the automatic installation script from the developer. I'm quoting the second paragraph of www.feynarts.de The automatic installation script gets you started quickly and easily. NEW Major improvements for Cygwin and Mac. Download the shell script FeynInstall [6 kB, ...

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Hmm, actually I thought that I wrote it in the wiki in a pretty clear way. For FeynCalc 9.0: https://github.com/FeynCalc/feyncalc/wiki/FeynArts#patching_fa2 For FeynCalc 8.2: https://github.com/FeynCalc/feyncalc/wiki/FeynArts#patching_fa FeynCalc 9.0 is still in development (Development version), but will be released until the end of this year. The ...

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Here's a short-worded solution for Mac OSX Mathematica 10. I am sure there are smoother ways to fix this but this worked for me: Autoinstall FeynCalc directly from Mathematica 10 by writing Import["http://www.feyncalc.org/install.m"] This will create a directory in /Users/Yourname/Library/Mathematica/Applications. The name of the directory will be ...

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If[Read[StringToStream[$Version], Number] >= 9 ,FilterOptions[a_,b___] := Sequence @@ FilterRules[{b}, Options[a]] ]; would be a general use bridge to make notebooks and packages before version 9 and later compatible with respect to FilterOptions being superseded by FilterRules having a different call interface. You may place it into ... 3 Every symbol always has a context. Most of the time we are in the Global context.$Context (* "Global" *) Normally we don't have to specify a variable as Globals Simply writing s is sufficient provided we are in the Global context. Inside your package the symbols and functions are defined in the SimulatorV2Debug`Private context. In the function ...

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My suggestion would be to use xPert to generate the expressions in abstract indices. Once you have those then use xCoba to establish your metric in a particular chart, then you can expand your perturbative expression in the chosen coordinate basis according to the operations under the xCoba documentation. I have a slide show on how to do this sort of thing ...

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This should work. Step 1) Run the command below to find your Base directory FileNameJoin[{\$UserBaseDirectory, "Applications"}] In my case it was "C:\\Users\\Username\\AppData\\Roaming\\Mathematica\\Applications" Step 2) Copy all the folders inside the LevelScheme folder (this is crucial do not copy the main folder, only its contents are to copied) ...

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