# Be a part of Wikipedia (Mathematics, Searching the web)

**Here is how you can help:**

**Click on one of the links** in the list on the left hand side ("List of mathematics articles containing dead external links"). This will bring you directly to the article that needs attention.

Then, **click on "Edit"** at the top of the screen (next to the search field):

**Find the dead external link**: Search for the term "Dead link" (you can use your browser's search function – in most browsers that's pressing CTRL and F at the same time).

**Repair the dead external link**: There are several ways to repair a dead link. Often web pages have simply moved, either in connection with a migration to a new server, or through general site maintenance. A site index is a useful place to locate the moved page. A search engine query using the title of the page, possibly with a search restriction to the same site, might also find the page. Once you've found the new location of the link, **replace the dead** link with the one you've found. Then, **remove the template** that indicated that the article contained a dead link (e.g. `{{Dead link|date=September 2010|bot=H3llBot}}`

). See Wikipedia's page on link rot for further instructions.

Finally, enter a description of what you have done in the "**Edit summary**" field (e.g. "Fixed dead external link") and click on the "**Save**" button. Wasn't that easy? Thanks for helping to improve Wikipedia!

**List of mathematics articles containing dead external links:**

- András Gyárfás
- BCMP network
- Canada/USA Mathcamp
- Collage theorem
- Disjunction property of Wallman
- Erdős–Bacon number
- Eric Bach
- Favard operator
- Felix Klein Protocols
- Ganita-yukti-bhasa
- Govindasvāmi
- Herbert Sichel
- Hilbert's problems
- Infinite monkey theorem in popular culture
- Knight's tour
- Kirby–Siebenmann class
- List of winners of the Mathcounts competition
- Math for America
- Mathematics and art
- Plane (geometry)
- Pythagorean theorem
- Roman Bezrukavnikov
- Sand table
- Square wheel
- Torkel Franzén
- Truncated rhombic triacontahedron
- Zsigmondy's theorem