Download RHS_TEST.mw

@Preben Alsholm 

Download RHS_TEST.mw

@Preben Alsholm 

@tomleslie 

Thank you. It was long way to do a simple think.

I use Simulink for simulation, you have Stop element to stop the simulation let say if the v(t) > 100 .

O.k thank you again 

Download Event_Test.mw

@tomleslie 

@tomleslie 

Thank you. 

I want to stop the simulation if the s(t) > const.

Or same problem but s(t) > f(s(t)) .

 How can i do it?

@Carl Love 

Thank you. This is easy solution 

@Carl Love 

Thank you this solution work!,,

@nm 
I get a Error

Error, Sleep is not a command in the Threads package

@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. I did't found it at help for dsolve

@laurent 

Thank you got idea

@tomleslie 

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 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 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