add files arraypy.py, Riemannian_Geometry, tensor_fields, tensor_methods

to sympy/tensor
Actually the file iemannian_geometry.py at all does not repeat diffgeom.


2014-06-09 23:26 GMT+07:00 Stefan Krastanov <notifications@github.com>:

> In sympy/tensor/tensor_fields.py:
>
> > @@ -0,0 +1,625 @@
> > +#-*- coding: utf-8 -*-
>
> This file reimplements a lot of diffgeom as well.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/sympy/sympy/pull/7550/files#r13549473>.
>