Today's post, The Simple Math of Everything was originally published on 17 November 2007. A summary (taken from the LW wiki):

It is enormously advantageous to know the basic mathematical equations at the base of a field. Understanding a few simple equations of evolutionary biology, knowing how to use Bayes' Rule, and understanding the wave equation for sound in air are not enormously difficult challenges. However, if you know them, your own capabilities are greatly enhanced.

Discuss the post here (rather than in the comments to the original post).

This post is part of the Rerunning the Sequences series, where we'll be going through Eliezer Yudkowsky's old posts in order so that people who are interested can (re-)read and discuss them. The previous post was No Evolutions for Corporations or Nanodevices, and you can use the sequence_reruns tag or rss feed to follow the rest of the series.

Sequence reruns are a community-driven effort. You can participate by re-reading the sequence post, discussing it here, posting the next day's sequence reruns post, or summarizing forthcoming articles on the wiki. Go here for more details, or to have meta discussions about the Rerunning the Sequences series.