Cluster algebras and Weil-Petersson forms
Michael Gekhtman, Michael Shapiro, and Alek Vainshtein
Source: Duke Math. J. Volume 127, Number 2
(2005), 291-311.
Abstract
In our paper [GSV], we discussed Poisson properties of cluster algebras of geometric type for the case of a nondegenerate matrix of transition exponents. In this paper, we consider the case of a general matrix of transition exponents. Our leading idea is that a relevant geometric object in this case is a certain closed 2-form compatible with the cluster algebra structure. The main example is provided by Penner coordinates on the decorated Teichmüller space, in which case the above form coincides with the classical Weil-Petersson symplectic form.
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Permanent link to this document: http://projecteuclid.org/euclid.dmj/1111609853
Digital Object Identifier: doi:10.1215/S0012-7094-04-12723-X
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