[Kronopath]

That's because you're accessing the site from HTTPS, or you have HTTPS Everywhere installed which is doing it for you. I think he's loading MathJax as HTTP, which means it gets blocked because it's coming from an insecure connection.

[schoen]

Thanks for this observation; I've commented on the existing GitHub issue to add this information.

https://github.com/jackschaedler/circles-sines-signals/issue...

[jfoutz]

Ah! Thank you so much.