Geodesic
An introduction to \(q\)-species
The electronic journal of combinatorics, Tome 12 (2005)

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The combinatorial theory of species developed by Joyal provides a foundation for enumerative combinatorics of objects constructed from finite sets. In this paper we develop an analogous theory for the enumerative combinatorics of objects constructed from vector spaces over finite fields. Examples of these objects include subspaces, flags of subspaces, direct sum decompositions, and linear maps or matrices of various types. The unifying concept is that of a "$q$-species", defined to be a functor from the category of finite dimensional vector spaces over a finite field to the category of finite sets.
DOI : 10.37236/1959
Classification : 05A15
Mots-clés : enumerative combinatorics, functor, category 
Kent E. Morrison. An introduction to \(q\)-species. The electronic journal of combinatorics, Tome 12 (2005). doi: 10.37236/1959
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     journal = {The electronic journal of combinatorics},
     year = {2005},
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     doi = {10.37236/1959},
     zbl = {1090.05002},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1959/}
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