130 Reputation

5 years, 212 days

@Carl Love  Thank you. This is eas...

Thank you. This is easy solution

@Carl Love  Thank you this solutio...

Thank you this solution work!,,

@nm  I get a Error   Error, ...

@nm
I get a Error

Error, Sleep is not a command in the Threads package

@one man  Thank you. This is my ev...

@one man
Thank you.

This is my event statment that dos'nt work ?

s(tau) is a solution of the dsolve(...)

@rlopez
I have Maple 13

@one man  Thank you . I will try it...

@one man
Thank you . I will try it. I did't found it at help for dsolve

@laurent  Thank you got idea...

Thank you got idea

@tomleslie  Tank you. But I ...

Tank you.

But I prefer to change the Matlab procedure to

Matlab(...) to Matlab(...,file) and handle this inside the procedure.

Same for latex()

@Markiyan Hirnyk  in minkowski spac...

in minkowski space,you have 4 variable t,x,y,z

in Eucliduan space, you have only 3 variable , so we are in complite in deferent spaces.

Please look again on the geodetic equations.

The equation of motion are the geodetic equations, which is the shortest  distance

between A and B.

Eli

@Markiyan Hirnyk  well, The geodedi...

well, The geodedic equations are different. please look at the link that I send you, how is the calculation of the geodetic equations. you start with the metric ,input, so for different metric you get different geodetic equations.

In minkowski space you need the so call signature this is the eta matrix in my program input.

You get also different geodetic line for sphere, torus, zylinder , hyperbola ......, what so ever.

With this program that I put hear you can calculate the geodetic , equation of motions very easy.

Try to get the geodetic with maple programm with(tensor) ....., so you can see  how easy is it to use my programm.

If you have problem with it, I can send you the maple calculations my examples.

Best Regards

Eli

@Markiyan Hirnyk    more refer...

more references

https://en.m.wikipedia.org/wiki/Geodesic

regards

Eli

@Markiyan Hirnyk  Some reference ht...

Some reference

https://en.m.wikipedia.org/wiki/Minkowski_space

Regard

Eli

@Markiyan Hirny  minkowski space is...

minkowski space is 4 dimensional Space.

The equation of Motion arme The geodetic line, you can calculate the equations with the metric and the chistofel symbols, but I am using different approach. Of course the result are the same.

I hope I could answer your quastion?

@John Fredsted  o.k this is what I ...

o.k this is what I need perfect!

G:=get_compts(Estn)

for Einstein Tensor

thank you

@panke  again, G is not the metric ...

again, G is not the metric (input)! G is the output !

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