## 65 Reputation

2 years, 190 days

## @ecterrab  As always, perfect! Th...

As always, perfect!

Thank you very much!

## @ecterrab  You are absolutely righ...

You are absolutely right! Thank you very much!

## @Torre  You are completely right! ...

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

## @Kitonum  Got it! I would like to ...

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 ...

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

## @Kitonum  Helped me a lot! Thanks ...

Helped me a lot! Thanks for your help!

## @Preben Alsholm  Sure! -sqrt(-(2*...

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...

@vv You are amazing! Thank you very much!

I would like to thank everyone for their support!

## @Rouben Rostamian  Sorry! Here is m...

@Rouben Rostamian  Sorry! Here is my code:

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

## @_Maxim_  Sorry, I didn't see ...

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

## @acer  Thanks for your help! I ca...

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.

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

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! ...

You are amazing! Thanks! I will test!

## @ecterrab  First of all, thanks fo...

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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