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Mitch1123
science forum beginner
Joined: 30 Nov 2005
Posts: 40
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 Posted: Wed Jul 12, 2006 2:41 pm Post subject:
Re: Relations and Species of Structures
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jb wrote:
| Quote: | to deal with combinatorial objects on a ground set A, we can use k-ary
relations A x ...x A or the notion of species. When should I use k-ary
relations and when are species more appropriate. Is ther some work that
establishes a link between both concepts?
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k-ary relations (tuples) are a particular kind of species. A good
reference for combinatorial objects and species is:
Combinatorial Species and Tree-like Structure by François Bergeron,
Gilbert Labelle, Pierre Leroux
or a web serach on 'species combinatorial' (wikipedia, etc)
Mitch |
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William Elliot
science forum Guru
Joined: 24 Mar 2005
Posts: 1906
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| Posted: Wed Jul 12, 2006 1:03 am Post subject:
Re: Relations and Species of Structures
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On Tue, 11 Jul 2006, jb wrote:
| Quote: | to deal with combinatorial objects on a ground set A, we can use k-ary
relations A x ...x A or the notion of species. When should I use k-ary
relations and when are species more appropriate. Is ther some work that
establishes a link between both concepts?
What's a species? |
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jb11
science forum beginner
Joined: 11 Jul 2006
Posts: 1
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| Posted: Tue Jul 11, 2006 8:26 am Post subject:
Relations and Species of Structures
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Hello,
to deal with combinatorial objects on a ground set A, we can use k-ary
relations A x ...x A or the notion of species. When should I use k-ary
relations and when are species more appropriate. Is ther some work that
establishes a link between both concepts?
Best
j |
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