How to deal with additions to the current repository

[1kastner]

First of all thank you so much for all the work you have put into the collection of those functions and sharing them with the community! I was wondering whether you see this git repository as a way how you share your implementation for specific scientific contributions you make (in some sense that would be archiving) or is this free to modification and extension (then some introductory words might not fit anymore)? Or do you have another approach for that? How would you like this to be handled?

Some ideas I came up with when I saw the repository was to create a simple GUI to make the test functions searchable (maybe in a Jupyter Notebook including a simple visualization of a function as well if feasible) or to extend the list of functions with some other test function collections (in each I found at least one function with a name not presented in the the test_funcs file). Furthermore, other operators such as a composition of test functions could be interesting (addition, multiplication, ...) or people could like to have some documentation for each function that shows the mathematical formula properly formatted and referring to publications regarding that function etc.

I am more than willing to invest some time in this since a lot of great effort has already been spent on this. Thanks again and I am looking forward to your input!