Welcome to the Principia Mathematica Maps and Table Site (PM-MATS). The goal of this project is to make clear structural connections between different parts of Principia and to make analyzable data about the theorems, definitions, and primitive postulates in its text.

We do this by providing three digital tools: A map of Principia that allows you to see the whole book. 9,944 mini-maps (one for every starred number in Principia) that show you everything used to prove it and everything that it is used to prove (❋13.1 for example). A table of Principia that allows users to search for specific starred numbers, sections, chapters, and more, and also allows exportation of search results to JSON or CSV files. Via Trivium

Nearly a year and a half ago, Joseph Newton did an excellent video about Cursed units. Now he's back with Cursed Units 2: Curseder Units! From fuel efficiency in square millimetres to the barrer, the definition of which has cm appear no less than four times, you're sure to encounter some weird (metric) units you'd not heard of. [2LYT]