PlanetMath

The main PlanetMath focus is on encyclopedic entries. It formerly operated a self-hosted forum, but now encourages discussion via Gitter.

An all-inclusive PlanetMath Free Encyclopedia book of 2,300 pages is available for the encyclopedia contents up to 2006 as a free download PDF file.{{usurped|1=[https://web.archive.org/web/20160620044430/http://planetphysics.org/?op=getobj&from=books&id=207 PlanetMath "Free Encyclopedia" book]}} based on 2004-2005 content of PlanetMath

PlanetMath implements a specific content creation system called authority model.[http://planetmath.org/?op=getobj&from=collab&id=34 Noosphere's] {{webarchive |url=https://web.archive.org/web/20160304034756/http://planetmath.org/?op=getobj&from=collab&id=34 |date=March 4, 2016 }} authority model

An author who starts a new article becomes its owner, that is the only person authorized to edit that article. Other users may add corrections and discuss improvements but the resulting modifications of the article, if any, are always made by the owner. However, if there are long lasting unresolved corrections, the ownership can be removed. More precisely, after two weeks the system starts to remind the owner by mail; at six weeks any user can "adopt" the article; at eight weeks the ownership of the entry is completely removed (and such an entry is called "orphaned").

To make the development more smooth, the owner may also choose to grant editing rights to other individuals or groups.

The user can explicitly create links to other articles, and the system also automatically turns certain words into links to the defining articles. The topic area of every article is classified by the Mathematics Subject Classification (MSC) of the American Mathematical Society (AMS).

The site is supervised by the Content Committee. Its basic mission is to maintain the integrity and quality of the mathematical content and organization of PlanetMath.{{cite web |author=Username * |url=http://planetmath.org/?op=getobj&from=collab&id=130 |archive-url=https://web.archive.org/web/20101126222624/http://planetmath.org/?op=getobj&from=collab&id=130 |url-status=dead |archive-date=2010-11-26 |title=ContentCommittee Charter |publisher=Planetmath.org |access-date=2013-09-06 }} As defined in its Charter, the tasks of the Committee include:

• Developing/maintaining the standards for PlanetMath content
• Improving individual PlanetMath entries in its Encyclopedia, Book, Paper, and Exposition)
• Developing topic areas
• Developing/improving site and user documentation
• Managing the PlanetMath Request list and Unproved Theorems list
• Improving categorization and other meta-attributes of entries.
• Developing software recommendations for improved content authoring and editorial functions.

PlanetMath content is licensed under the copyleft Creative Commons Attribution/Share-Alike License.

All content is written in LaTeX, a typesetting system popular among mathematicians because of its support of the technical needs of mathematical typesetting and its high-quality output.

PlanetMath originally used software written in Perl and running on Linux and the web server Apache. It was known as Noösphere and has been released under the free BSD License. PlanetMath retired Noösphere in favor of another piece of software called Planetary, implemented with Drupal.

Encyclopedic content and bibliographic materials related to physics, mathematics and mathematical physics are developed by PlanetPhysics. The site, launched in 2005, uses similar software (Noosphere), but a significantly different moderation model with emphasis on current research in physics and peer review.{{usurped|1=[https://web.archive.org/web/20090225121156/http://planetphysics.org/ PlanetPhysics.org]}}

• arXiv
• CogPrints
• List of online encyclopedias
• MathWorld
• MathOverflow

{{Reflist}}

• {{official website}}
• {{cite web |url= http://planetphysics.org |title= PlanetPhysics |url-status= usurped |archive-date= February 25, 2009 |archive-url= https://web.archive.org/web/20090225121156/http://planetphysics.org/ }}
• {{cite web |first= Aaron E. |last= Klemm |url= http://freesoftwaremagazine.com/articles/wiki_value/ |title= Motivation and value of free resources: Wikipedia and Planetmath show the way |date= February 16, 2005 |publisher= Free Software magazine }}
• {{cite journal |url= http://www.dvara.net/HK/issue.pdf |journal= Free Software Magazine |issue= 1 |date= February 2005 |title= Motivation and value of free resources |pages= 52–56 |display-authors= 0 |first= Aaron E. |last= Klemm }}
• {{cite journal |series= Netwatch |title= Web Projects: Grassroots Math Guide |volume= 308 |issue= 5729 |date= 17 June 2005 |page= 1721 |doi= 10.1126/science.308.5729.1721e |journal= Science |publisher= AAAS |doi-access= free }}
• {{cite book |first= Christoph |last= Lange |title= The Semantic Web: Research and Applications |series= European Semantic Web Conference (ESWC) |date= 2008 |pages= 832–837 |chapter= SWiM – A Semantic Wiki for Mathematical Knowledge Management |volume= 5021 | arxiv= 1003.5196 |doi= 10.1007/978-3-540-68234-9_68 |isbn= 978-3-540-68233-2 |s2cid= 167021 }}
• {{cite arXiv |first1=Robert |last1=Milson |first2=Aaron |last2=Krowne |eprint=cs/0507028 |title=Adapting CBPP platforms for instructional use|year=2005 }}
• {{cite journal |first=Alex M. |last=Andrew |title=Archives, mathematics encyclopaedia, dancing robots, ASC |journal=Kybernetes |date=2008 |volume=37 |issue=9/10 |pages=1466–1468 |doi=10.1108/03684920810907805}}

Category:Mathematics websites

Category:Online encyclopedias

Category:Wiki communities

Category:Canadian online encyclopedias