Torsten Kemps-Benedix

Build error in macOS 11

11

**Describe the bug** I get the following build error after following the getting started instructions: ``` tkx@Torstens-MBP-3 [18:28:27] [~/devel/miso/sample-app] [master] -> % nix-build these derivations will be built: /nix/store/h0s3aagn5ry0c8i21c82zkk07rnf0zgd-miso-1.6.0.0.drv /nix/store/4afismzhx4arim5mk95rm3kydbl9cps5-app-0.1.0.0.drv...

User guide needs update with respect to four_vector

1

The user guide right in the first section mentions and uses `from einsteinpy.coordinates.utils import four_position, stacked_vec` but these seem to no longer exist.

Install fails on macOS 11

3

I followed the installation instructions for macOS. I use macOS 11 Big Sur. I get the following error. Apparently there seems to be a problem with the clang compiler. ```...

After freshly cloning this repo I get the following error: ``` >>> git clone https://github.com/reflex-frp/reflex-examples.git Cloning into 'reflex-examples'... remote: Enumerating objects: 1637, done. remote: Total 1637 (delta 0), reused 0...

Restriction on the number of equality constraints

2

The NLopt optimizer returns NLOPT_INVALID_ARGS if you give more than n equality constraints in a problem with n variables. This is totally reasonable in linear settings but not necessarily in...

butcher method for models fitted with brglm2

1

The brglm2 fitting functions adds some more stuff and it would be nice to have a butcher method like the following: ``` butcher.brglmFit