4.36.3 Can you answer these questions?

4.36.3.1 Covariant derivative given Christoffel symbols

https://mathematica.stackexchange.com/questions/155871/covariant-derivative-given-christoffel-symbols

 
I've been trying to take covariant derivative of various quantities along various surfaces in Mathematica, but I keep running into issues, frequently I get a tensor with the wrong dimension. Using the  ...
 

- asked by Noahb32 1vote

4.36.3.2 How to pass in-memory images through ExternalEvaluate?

https://mathematica.stackexchange.com/questions/156051/how-to-pass-in-memory-images-through-externalevaluate

 
Version 11.2 has a new import/export format PythonExpression. 
 
Unfortunately, it doesn't work out-of-the-box with images: 
 
 
 
And using the ImageData directly is too slow: 
 
 
 
Anyhow, I have some image  ...
 

- asked by M.R. 4votes

4.36.3.3 GeneralizedLinearModelFit IRwLS

https://mathematica.stackexchange.com/questions/155692/generalizedlinearmodelfit-irwls

 
I'm interested in Mathematica's capabilities with regard to robust fitting vs. outliers. In the Statistical Model Analysis Tutorial under the Generalized Linear Models section heading, there is this  ...
 

- asked by Chris Chiasson 1vote

—