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Results tagged with physics
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user 71570
Questions related to the application of Mathematica to problems in physics.
2
votes
0
answers
316
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The Weyl Scalar: does anyone here knows a code to calculate it?
From pure differential geometry we have an important tensor called Weyl Tensor. Its components are given by:
$$C_{ijkl} = R_{ijkl} - \frac{2}{n-2}(g_{ik}R_{jl} + g_{jl}R_{ik} - g_{il}R_{jk} - g_{jk}R …
- 503
2
votes
0
answers
460
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How to plot the lines of the magnetic fields of a Tokamak using StreamPlot3D?
I would like to plot the magnetic field lines of a tokamak.
Introduction
Since the magnetic field is solenoidal: $\nabla \cdot \vec{B} = 0$, it is possible to decompose it as:
$\vec{B} = \vec{B}_{T} …
- 503
4
votes
2
answers
382
views
Klein-Gordon Equation: how can I write the summation?
I would like to write a program that gives me the Klein Gordon Equations given a metric. I will explain.
My code is in the following:
I) Standard Quantities
I have no doubt here the first part is give …
- 503
3
votes
1
answer
407
views
A doubt on ParametricPlot3D, RevolutionPlot3D, ListPlots and NIntegrate: can I build an "Rev...
PART I) Some Physics and Mathematics
I.1) A "nothing" on Gravity and Black Holes
Black Holes are solutions of Einstein Field Equations. … An important fact on tensors is something called general covariance: the physics is independent of coordinates; the nature phenomena do not care about coordinates; the equations of physics must to be independent …
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