Hi!

I was trying to obtain the field equations for the QED Lagrangian and I was not sucessfull.

All my calculations are equal to 0.

Can someone give a hand?

QED.mw

Thanks a lot.

I am not aware if is a problem with me or else.

Have some questions about the select command and (possible) big tensorial expressions. I think it would be a simple question to manage, but I still have problems.

TensorEnergiaMomento.mw

Thanks a lot

I have some problems with Commutator and d_.

Please any help will be good for me.

Identidades_de_Bianchi.mw

Thanks a lot.

Hi I have some problems with the inert view of the limit command.

I have upload the file. 

bug_limit.mw

Thank you.

Hi, I would like to know if there is a command on Maple 18 that can show all the decompositions of a given symbolic tensor.