Featured math content


by Eric Bruylant Oct 24 2016

Some Arbital pages we think are great!

Here are a few of the best pages on Arbital, selected by our editors.

Bayes' rule: Guide

A customizable multi-page exploration of one of the core concepts behind good reasoning.


An extended exploration of logarithms and their various uses.


An engaging explanation of derivatives, suitable for almost everyone.

Uncountability: Intuitive Intro

A graphical explanation uncountability, with alternate lenses for people with different mathematical backgrounds.

Partially ordered set

Posets and tightly related concepts pitched for a technical audience, with exercises and examples.

Rice's Theorem

An explanation of Rice's Theorem and its implications, with a lens that explores the connection between the theorem and the [-halting_problem].

Category theory

Various pages on Category Theory, exploring how concepts from different domains of mathematics share the same underlying structure.


A handy Disambiguation page between the four different things people sometimes mean when they say "bit".