Talk:Quotient of a formal language

	Mathematics portal This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MathematicsWikipedia:WikiProject MathematicsTemplate:WikiProject Mathematicsmathematics articles
???	This article has not yet received a rating on the project's priority scale.

Computer science

This article is within the scope of WikiProject Computer science, a collaborative effort to improve the coverage of Computer science related articles on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Computer scienceWikipedia:WikiProject Computer scienceTemplate:WikiProject Computer scienceComputer science articles

???

This article has not yet received a rating on the project's importance scale.

Things you can help WikiProject Computer science with:

Here are some tasks awaiting attention:

Article requests :
- Requested articles/Applied arts and sciences/Computer science, computing, and Internet
Cleanup :
- Computer science articles needing attention
- Computer science articles needing expert attention
Copyedit :
- Computing
Expand :
- Computer science
Infobox :
- Computer science articles without infoboxes
Maintain :
- Timeline of computing 2020–present
Photo :
- Find pictures for the biographies of computer scientists (see List of computer scientists)
- Computing articles needing images
Stubs :
- Computer science stubs
Unreferenced :
- WikiProject Computer science/Unreferenced BLPs
Project-related :
- Tag all relevant articles in Category:Computer science and sub-categories with {{WikiProject Computer science}}

Requests and comments[edit]

The definition from formal language seems like it would be a good start. —The preceding unsigned comment was added by 67.30.5.108 (talk • contribs) 09:00, 26 October 2003 (UTC).[reply]

Some examples would also be very nice. —The preceding unsigned comment was added by 131.247.23.72 (talk • contribs) 16:20, 26 June 2007 (UTC).[reply]

On properties of quotients[edit]

The previous version incorrectly claimed that a quotient of two context-free languages is context-sensitive.

This is false, any RE set can be constructed in a similar way as the Computation history of a Turing machine can be constructed as an intersection of two context-free languages.

Misof (talk) 21:21, 8 April 2008 (UTC)[reply]