Ciro Santilli @cirosantilli 40

The following things come to mind when you look into research in this area, especially the search for BB(5) which was hard but doable:

Bibliography:

Biography of Enrico Fermi by fellow physicist, free rent on the on the Internet Archive: archive.org/details/enricofermiphysi0000segr

This is generally good, especially compared to how crappy Evince, the default Ubuntu one, has been around 2014-2020.

Represents image pixel by pixel, rather than by mathematical primitives such as done in vector graphics:

quoteinvestigator.com/2017/09/25/progress/ on Quote Investigator says it appeared in 1948. Can't easily check, but will believe it for now.

The first key paper to his approach to quantum electrodynamics apparently.

Published on Physical Review 76.769.

Interesting fractal approach to a phylogenetic tree: www.onezoom.org/

Mostly data driven.