Name: BWL Date: 06/24/20-03:23:22 PM Z


Thank you!

The way you suggested partly solved my problem, but if I wanna take trace with something mixing with GSD, the ReplaceAll then doesn’t work well.
I now treat my problem with some clumsy way and the steps are as follows:
first, I finish taking trace in D-dimension, and let the result shown in StandardForm;
then, I replace all Ds with 4s and thus bring DiracTrace with GA[5] back to 4 dimension;
finally, I simplify the results from the 2nd step with DiracSimplify and obtain the final result I want.

In my example, the prescription above works however of course it’s an ugly way at the same time…

Best regards!
BWL