I'm a professional mathematician, but not a practicing one because of my actual employment. However, I run a free and non-commercial website dedicated to mathematics and the axiomatic method. My goal is to promote the competency of thinking logically and of formulating proofs as basic skills rather than something reserved for academia. I want to achieve this goal by developing and complementing (at least the basics) in the theory of different mathematical disciplines and provide these results under the CC BY-SA 3.0 license to the public for educational purposes.
Although - strictly applying the axiomatic method - I have developed some basic theory in analysis, algebra, topology, probability, and geometry since 2014, this is a mammoth project for just one person like me. Therefore, I hope that I will find in this mailing list co-authors willing to actively join my project.
The project is located at
https://www.bookofproofs.org/. It allows integrating SageMathCell in each article. This is as simple as typing in your text
§§§<div class='sage'>.....</div>§§§
with "...." standing for some Sage code you like.
I think that SageMathCell would definitely make existing contents (e.g. theorems, definitions, examples) of the project more interactive and encourage the readers to "experiment" with mathematics in the context of all articles.
You could support the project by enriching existing articles with SageMathCell or sharing your expertise in a specific mathematical discipline if you like.
It would be great to read about your opinion and to welcome at least some of you as co-authors of the project. Cheers!
bookofproofs