Hi all,
I have a good news.
I have started a Romanian article about Species in Wikipedia :
http://ro.wikipedia.org/wiki/Specii_de_numereThe title is "Number Species".
By vulgarisation, a species becomes in my article a multiset of permutation groups.
Q: Then, why an article about species, and not an article about permutation groups ?
A: 1) The Theory of Species adds combinatorial
meaning and more ; it is not just equivalent to the theory of permutation group.
2) The Theory of Species offers a
systematical description of many combinatorial objects.
3) The Theory of Species offers a tool,
the e.g.f., to quickly obtain numerical results on combinatorial questions.
4) The Theory of Species offers a foundation for the rigurous meaning of the gramatical preposition OF.
5) The Theory of Species open a generalisation - at the same level of understanding of cardinal and ordinal numbers
and so on....
6) Computer Scientists need a simplified approach rather then a sophisticated algebraical one.
7) Ingineers need a simplified explanation of what field (line), group (vector space) and what "degree" of liberty could means.
and so on...
I use French as metalanguage as well as diagrams.
I am also planning to insert combinatorial definitions whereever is possible