Somerville is a personal maths and visualization project. It is a playgorund for testing artsy stuff and is most certainly not useful for anybody else.
There is no guarantee for correctness of any implementation, nor for their completeness. If you care about such things you may want to take a look at Thi.ng
Yet, if you are still interested run
make fig
and play with the visualiaztions in your browser at http://localhost:9500/.
It also contains a link to the sidenotes documentation of the project.