8.29.3 Can you answer these questions?

8.29.3.1 Mathematica not creating Graph

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=272911

Trying to make a graph according to the  documentation, but it isn't being made. I try plotting with no success; it seems like the graph isn't being created. 
Does this have anything to do with ... 
[graphs-and-networks]
 

asked by Trun Vishal https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=88048 Score of 1

8.29.3.2 Error message installing Ricci

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=273148

I just started using Mathematica. With the goal of solving 
a Loop  integrals over a scalar gravity interaction. For the tensor calculus necessary i wanted to use, Ricci.https://sites.math.washington.... 
[physics] [packages] [tensors]
 

asked by Faktor 2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=88116 Score of 1

8.29.3.3 xAct rule for antisymmetrization

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=273113

using the xAct I'm trying to make a rule that the antisymmetrization in three indices of an expression goes to zero. Namely I have the killing vector 
$$ 
\xi^a 
$$ 
defined using ... 
[xact]
 

asked by Nitaa a https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=82839 Score of 1

answered by jose https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10552 Score of 0