Jyotirmaya Shivottam

Add new coordinate and metric classes

9

🐞 **What bugs you?** The core modules of EinsteinPy are well-integrated, after #512 & #521. Now, we can add more metric classes to the module, in all usual coordinates, corresponding...

🐞 **Problem** All the methods in `coordinates.differential` and by extension, `coordinates.utils`, **that calculate or make use of 4-Velocity,** are mathematically incorrect, as `v_th` and `v_p` are Angular Velocities, but are...

Scaling error in `utils.kerrnewman_utils.py`

1

🐞 **Problem** In [`utils.kerrnewman_utils.em_potential()`](https://github.com/einsteinpy/einsteinpy/blob/d4f162f3c7b8ab5c87ac7fcdc1488a8f31b68252/src/einsteinpy/utils/kerrnewman_utils.py#L423) and in [`utils.kerrnewman_utils.maxwell_tensor_covariant()`](https://github.com/einsteinpy/einsteinpy/blob/d4f162f3c7b8ab5c87ac7fcdc1488a8f31b68252/src/einsteinpy/utils/kerrnewman_utils.py#L472-L475), there is a factor of `c ** 2 / G * M`, that appears to be erroneous. This is perhaps related to #144....

🐞 **Problem** After #512, the `metric` module has seen some major changes, one of them being the introduction of a `BaseMetric` class. As the name suggests, this class serves as...

I went through your code and had a few queries regarding some segments. I have compiled the queries below and I would really appreciate it, if you can clarify them:...

Streamline the `coordinates` module

11

### 🐞 Problem Currently, there are many redundancies in [`einsteinpy.coordinates`](https://github.com/einsteinpy/einsteinpy/tree/main/src/einsteinpy/coordinates). There's a ton of code rewrite instead of reuse between the various modules. This was done for various reasons, but...

ReadTheDocs PDF builds are failing

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## 🐞 **Problem** Title. And see: https://readthedocs.org/projects/einsteinpy-project/builds/22003206/.

Documentation at docs.einsteinpy.org needs updates

8

### 🐞**Problem** The docs are partially outdated. This issue is intended to track all the problems and fix them successively. - [x] ~⭐ API docs need improvements (general language and...

Add new example Jupyter notebooks / edit old ones

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### 🐞 **Problem** We need new [example notebooks](https://github.com/einsteinpy/einsteinpy/tree/main/docs/source/examples) or edits to older notebooks to highlight the feature additions and API changes that EinsteinPy has seen over the years. Recently, two...

Documentation overhaul

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### 🐞**Problem** (Moved from #614) We need help with the following with respect to the API documentation ("API reference") of the various EinsteinPy submodules: 1. Fixing grammatical errors and making...