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How can I evaluate specific expressions in FeynCalc? For example, if there is a $delta^i_j$, how can I set $i$ to 1 and $j$ to 2 and...
Asked on 03/28/2021
1 answerBelow is the code to print the x value. ActCoorX = Range[0, 12000, 500] {0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, ...
Asked on 03/28/2021 by user75507
2 answerThe plot shown below was obtained from a similar program mentioned in the following post. 3D Elastic waves in a glass How can I have a contour bar (color...
Asked on 03/28/2021
1 answerI want to create a FormFunction that takes arbitrary many integer numbers and calculates the average. You want to use only one input field, but for more convenince allow users...
Asked on 03/28/2021 by giuseppe scafiti
3 answerAre there any known methods or examples of connecting Mathematica with Tableau in any fashion? I'll accept any solution that demonstrates a method of either:Calling Tableau...
Asked on 03/27/2021
1 answerI have recently updated Mathematica to 12.1. Whenever I export strings as text now, as in the following MWE: Export["test.txt", "a", "Text"]a highlighted question mark appears...
Asked on 03/27/2021 by david1983
1 answerI have a generic function:f[a_,b_]:=Module[{e,f,g,h}] which returns the scalar g and the list h in the form:{g,h}. Because of RandomInteger inside the Module block, I have several results...
Asked on 03/27/2021
1 answerI am slowly learning how to use Feyncalc, and I have a quick question. I have a third rank tensor B[mu,nu,tao] and I also have a four-vector FV[W,mu]. I...
Asked on 03/27/2021 by Andrew Hyman
1 answerI am trying to solve two coupled non-linear differential equations for $F(r)$ and $h(r)$:$$begin{aligned}F''-F(F^2-1)/r^2- Fh^2&=0 h''+2h'/r-2F^2h/r^2+beta^2/2 h(1-h^2)&=0end{aligned}$$I know the solutions' behaviour...
Asked on 03/27/2021
1 answerI remember starting in Mathematica11, when calculating the status of the taskbar can indicate the current statusToday I upgraded to...
Asked on 03/27/2021
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