All Questions
10 questions
2
votes
1
answer
354
views
Metric tensor calculation tool? [duplicate]
The Einstein field equations are
$G_{\mu\nu}+\Lambda g_{\mu\nu}=\kappa T_{\mu\nu}$
which would be easy enough to solve if not for all of the nonlinear dependencies on $g$ that the Einstein tensor $G$ ...
3
votes
0
answers
133
views
How to use Python to get mathematical expressions in General Relativity [duplicate]
I'd like to get the metric tensor that describes a non-rotating, uncharged, perfectly spherical black hole whose radius grows with time (it gains mass). For now, I have:
$g_{\mu\nu}=\begin{pmatrix}
-c^...
3
votes
1
answer
296
views
Numerical package for backreaction in general relativity
I am looking for numerical packages (Python/Matlab or some common languages) that can simulate the backreaction of the matter on the Kerr black hole geometry: i.e. assume I have a given initial ...
1
vote
2
answers
203
views
Software for calculating perturbation effects in general relativity
I need to evaluate the Einstein tensor/ Ricci tensor and others in a perturbed metric. Suppose my metric is
$g_{ab} =\eta_{ab} +h_{ab}$, where $\eta$ is the Minkowski metric, and $h$ is a small ...
0
votes
0
answers
34
views
Mathematical software for calculating Christoffel symbols, curvature, etc [duplicate]
I'm looking for a Mathematical software that can do the following:
I put in a metric (some kind of a two-dimensional matrix), and the software calculates Christoffel symbols, Ricci curvatures, ...
2
votes
1
answer
1k
views
Tensor manipulation software [duplicate]
Does anyone know of any free tensor manipulation software for use in General relativity? e.g GR tensor
(this includes software that needs programs such as mathematica or matlab to use)
8
votes
0
answers
194
views
Visualising General Relativity [closed]
I've recently found myself with copies of both Maple and Mathematica and I'm looking to use it to study relativity and hopefully the field equations of GR.
I mainly study general relativity but I've ...
2
votes
0
answers
77
views
Do anyone know a good software that where I can easily find the metric from the stress-energy tensor? [duplicate]
I'm using SageMath but the obtainment of the metric from the stress-energy tensor is not trivial, i.e., it is not implemented in a predefined function.
Do anyone know a good software that where I can ...
8
votes
2
answers
1k
views
General Relativity visualization software
As I am approaching the study GR, I was wondering if there are softwares that allow a quick visualization of custom metrics, curvature, and particle motion even in the limited context of 2D space.
...
11
votes
5
answers
3k
views
Open source computer algebra systems for general relativity
I would like to use an open source computer algebra system (CAS) for research in general relativity. Kindly suggest a good choice between Ipython and Sage. I am more interested in the theoretical ...