# Featured math content

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.

### Logarithm

An extended exploration of logarithms and their various uses.

### Derivative

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.

### Bit

A handy disambiguation page between the four different things people sometimes mean when they say “bit”.

Parents:

- Mathematics
Mathematics is the study of numbers and other ideal objects that can be described by axioms.