Generalized cluster complexes via quiver representations

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We give a quiver representation theoretic interpretation of generalized cluster complexes defined by Fomin and Reading. By using $d-$cluster categories which are defined by Keller as triangulated orbit categories of (bounded) derived categories of representations of valued quivers, we define a $d-$compatibility degree $(-||-)$ on any pair of ``colored'' almost positive real Schur roots which generalizes previous definitions on the non-colored case, and call two such roots compatible provided the $d-$compatibility degree of them is zero. Associated to the root system $Φ$ corresponding to the valued quiver, by using this compatibility relation, we define a simplicial complex which has colored almost positive real Schur roots as vertices and $d-$compatible subsets as simplicies. If the valued quiver is an alternating quiver of a Dynkin diagram, then this complex is the generalized cluster complex defined by Fomin and Reading.
version 5, final version to appear in Journal of Algebraic Combinatorics. minor changes

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Representation Theory, Combinatorics, 16G20; 16G70; 05A15

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http://salesiana.dossiersoluciones.com/handle/123456789/131119

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0607155
 http://arxiv.org/abs/math/0607155

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arXiv