---
title: Mathworld
date: "2001-11-08T12:00:00Z"
categories:
  - links
wp_id: 1570
description: MathWorld is back online, providing its massive library of mathematical definitions, formulas, and proofs once again. This Wolfram Research resource remains the gold standard for anyone needing a comprehensive, searchable encyclopedia of mathematics.
keywords: [mathworld, wolfram research, eric weisstein, mathematics, encyclopedia, reference]
---

[Mathworld](http://mathworld.wolfram.com/) is back.