About some algorithms related to general relativity.

[Miguel González Duque]

Hey, guys.

I've been implementing some algorithms related to general relativity and manipulation of tensors (in a very algebraic sense). Here's the repo in github and here are some tutorials (1 and 2). Of course it's on very early stages and I would like to know if it's good enough to contribute it to sympy.

Thanks in advance, I look forward to hearing from your feedback.

[Francesco Bonazzi]

Hi,

thanks for sharing your code!

We already have 3 modules that could help:

• sympy.tensor.tensor ==> abstract tensor expressions
  
• sympy.tensor.array ==> N-dimensional arrays
  
• sympy.diffgeom ==> some differential geometry
  

I think sympy.tensor.array could be interesting for you. The main thing that sympy.tensor.array is lacking is support for the tensor valence (covariant/contravariant).

[Francesco Bonazzi]

Documentation links:

• http://docs.sympy.org/latest/modules/diffgeom.html
• http://docs.sympy.org/latest/modules/tensor/array.html