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The article had only 2 sentences, and so should be a stub. Obviously, either reference is sufficient for everything stated in the article, even with its expansion to 3 sentences! Please remove the warning about references, which is just an unhelpful distraction (unlike a stub notice, which has a more constructive function). Thanks. Kiefer.Wolfowitz ( talk) 23:48, 17 January 2010 (UTC)
I introduced subdivisions, and expanded the content in optimization and geometry. (I suspect that this content makes this article of greater interest to the public, notwithstanding the appeal of real algebraic geometry, etc.) Kiefer.Wolfowitz ( talk) 01:26, 18 January 2010 (UTC)
This could be adapted to illustrate the duality, spherical models, etc. Kiefer.Wolfowitz ( Discussion) 02:00, 23 March 2011 (UTC)
I didn't finish the revision. I'm sorry for leaving the last sections rough.
In Oriented matroid § Background, we find the following sentence:
- The empty signed set, is defined in the obvious way.
Sorry to say, it's not "obvious" how the empty set can have a partition into two (distinct) subsets, one the negative part and the other the positive part, of the empty signed set – since the empty set can have no subsets except itself. yoyo ( talk) 05:04, 15 November 2017 (UTC)
- The family P does not contain the empty set ….
- Except when the set X is empty, the family P does not contain the empty set ….
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||||
|
The article had only 2 sentences, and so should be a stub. Obviously, either reference is sufficient for everything stated in the article, even with its expansion to 3 sentences! Please remove the warning about references, which is just an unhelpful distraction (unlike a stub notice, which has a more constructive function). Thanks. Kiefer.Wolfowitz ( talk) 23:48, 17 January 2010 (UTC)
I introduced subdivisions, and expanded the content in optimization and geometry. (I suspect that this content makes this article of greater interest to the public, notwithstanding the appeal of real algebraic geometry, etc.) Kiefer.Wolfowitz ( talk) 01:26, 18 January 2010 (UTC)
This could be adapted to illustrate the duality, spherical models, etc. Kiefer.Wolfowitz ( Discussion) 02:00, 23 March 2011 (UTC)
I didn't finish the revision. I'm sorry for leaving the last sections rough.
In Oriented matroid § Background, we find the following sentence:
- The empty signed set, is defined in the obvious way.
Sorry to say, it's not "obvious" how the empty set can have a partition into two (distinct) subsets, one the negative part and the other the positive part, of the empty signed set – since the empty set can have no subsets except itself. yoyo ( talk) 05:04, 15 November 2017 (UTC)
- The family P does not contain the empty set ….
- Except when the set X is empty, the family P does not contain the empty set ….