Wikipedia described the essence of the Wiki concept as follows:
- A wiki invites all users to edit any page or to create new pages within the wiki Web site, using only a plain-vanilla Web browser without any extra add-ons.
- Wiki promotes meaningful topic associations between different pages by making page link creation almost intuitively easy and showing whether an intended target page exists or not.
- A wiki is not a carefully crafted site for casual visitors. Instead, it seeks to involve the visitor in an ongoing process of creation and collaboration that constantly changes the Web site landscape.
Now there are some wiki projects dedicated to mathematics which I would like to share:
- Tricki (http://www.tricki.org/) : This was started by Tim Gowers in 2008, but now it is dead.
- PlanetMath (http://planetmath.org/) : Due to advent of Wikipedia its popularity came down but still new articles keep coming.
- MathOverflow (http://mathoverflow.net/) : One of may successful and useful StackExchange projects.
- The n-Category cafe (https://golem.ph.utexas.edu/category/) : Not exactly a wiki but a “group blog”