Welcome to Mathipedia
A free encyclopedia of mathematics. Every article starts with intuition and works downward into the a more advanced and technical version, so you can stop reading at whatever depth answers your question. 26 articles so far.
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The ideas themselves — what a thing is, why it works, and where it shows up.
16 articles
Famous arguments, taken apart line by line.
4 articles
Hardware and software: what the buttons do, and what the machine cannot tell you.
2 articles
Mathematics in television, film, music, and fiction — and whether it checks out.
2 articles
Who worked it out, when, and what they were actually trying to solve.
1 article
Tables, identities, and notation you came here to look up.
1 article
Recently updated
- Differential Equations — September 9, 2026Equations that relate a function to its own derivative, the main families they are sorted into, and how separation of variables solves the simplest of them.
- Self-Solving Card Trick — August 20, 2026A simple card trick that uses algebra to look like magic
- Pi in bbno$'s "in my zone" — August 17, 2026A line in bbno$'s Valorant collaboration "in my zone" quotes pi as 3.1459
- Induction — August 16, 2026Proving a statement for every natural number by establishing a base case and a step that carries each case to the next, with the well-ordering property behind it and a worked example.
Contributing
Articles are plain Markdown files with LaTeX, images, and interactive Desmos and Wolfram Alpha embeds. Simply edit a file, open a PR. Start with the full article list to see what already exists.