deniscr

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2 years, 190 days
Universidade Federal do Espírito Santo

MaplePrimes Activity


These are replies submitted by deniscr

@ecterrab 

As always, perfect!

Thank you very much!

@ecterrab 

You are absolutely right! Thank you very much!

@Torre 

You are completely right! Thanks a lot for your help!

 

@Kitonum 

Got it! I would like to thank you for your help. I think there is a bug in 2-D math input

See ya!

@Kitonum 

I tried to use your tip but it don't worked.

@Kitonum 

Helped me a lot! Thanks for your help!

@Preben Alsholm 

Sure!

-sqrt(-(2*(-r/(-r+2*M))^eta*M-(-r/(-r+2*M))^eta*r)/r)*X*sqrt(-(-(-r+2*M)/r)^eta*r/(-r+2*M))/f

or

simplification.mw

@vv You are amazing! Thank you very much!

I would like to thank everyone for their support!

@Rouben Rostamian  Sorry! Here is my code:

Download matrix_calculation.mw

I know de matrix U but I can't to find the matrix U

@_Maxim_ 

Sorry, I didn't see your comment! I put here the matrices C and M.

@acer 

Thanks for your help!

I can't apply your suggestion to my problem. The matrices M and C are the following

 

By the way, I know the matrix U

The point is: I need to reproduce this case to apply in another case.

@acer 

Thanks for your answer!

Unfortunately, the matrix U is a unknown matrix. It isn't numeric matrix.

@Kitonum 

Thanks for your answer!

I use Maple 2017 and still happening,

It changes when I do the command g_[line_element] in package Physics. Later this change causes some problem in the rest calculations.

@ecterrab 

You are amazing! Thanks! I will test!

 

@ecterrab 

First of all, thanks for your reply.

I'd like to say that I know the Physics package and I think it's fantastic. I have done a great deal in him, especially in General Relativity. I have also followed the launch of Maple 2017 and its news!

I can say that I know the commands that you have indicated.

Initially, I tried to use the Physics package, but in it I can not reproduce a certain result.

Starting from this metric

I need to get this

and

.

With this definition

Unfortunately, the Physics package does not reproduce these results in the same way. So I had to resort to the grtensor, but I can not define all the components of the tensor.

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