How to calculate rotation and spin coefficients of tetrads in SageMath?
I'm trying to reproduce the results of this paper where the author calculates the Ricci rotation and spin coefficients with Mathematica, when provided a metric and a choice of tetrads. I looked through the literature and references of SageMath and I couldn't find any mention of tetrad methods.
I came across this post in this forum from 3 years ago where the answer mentions that general tetrads are implemented but spin coefficient methods are not. It links to the documentation page with a lot of info and since I'm an amateur in SageMath, I'm finding it very difficult to understand what needs to be done. Can anyone help me with how to do this or maybe refer me to a notebook example where this is done? Please let me know. Thanks.
I think it is not implemented in SageMath yet. However, you can use https://www.wolframcloud.com/ with the free basic plan option and try the Mathematica codes in the article you mentioned.
Dear @AKGSage, if you are still interested, our very recent package (with our special thanks to @eric_g) https://pypi.org/project/SageNP/ can be useful (and I would love to hear your comments).
I'm sorry for the delay in replying. Your package looks very promising, thanks for integrating NP formalism to Sage, it was long overdue. I'm feeling bad that I'm still learning stuff to contribute something to feats like this. Hopefully, I can assist in building this wonderful language more in the future.
I will definitely check out your NP package and will get back to you soon :)