Relational Poly-Klumpenhouwer Networks for Transformational and Voice-Leading Analysis
Journal of Mathematics and Music,2018 Vol. 12, No. 1, 35–55, https://doi.org/10.1080/17459737.2017.1406011 Relational poly-Klumpenhouwer networks for transformational and voice-leading analysis a b c Alexandre Popoff ,MorenoAndreatta ∗,andAndréeEhresmann a119 Rue de Montreuil, 75011 Paris; bIRCAM-CNRS-UPMC, Paris, and IRMA-CNRS-GREAM, Université de Strasbourg, Strasbourg, France; cLAMFA, Université de Picardie, Amiens, France (Received 21 December 2016; accepted 12 October 2017) In the field of transformational music theory, which emphasizes the possible transformations between musical objects, Klumpenhouwer networks (K-nets) constitute a useful framework with connections in both group theory and graph theory. Recent attempts at formalizing K-nets in their most general form have evidenced a deeper connection with category theory. These formalizations use diagrams in sets, i.e. functors C Sets where C is often a small category, providing a general framework for the known group or monoid→ actions on musical objects. However, following the work of Douthett–Steinbach and Cohn, transformational music theory has also relied on the use of relations between sets of the musical elements. Thus, K-net formalizations should be extended further to take this aspect into account. The present article proposes a new framework called relational PK-nets,anextensionofourpreviouswork on poly-Klumpenhouwer networks (PK-nets), in which we consider diagrams in Rel rather than Sets.We illustrate the potential of relational PK-nets with selected examples, by analyzing pop music and revisiting the work of Douthett–Steinbach and Cohn. Keywords: transformational analysis; category theory; Klumpenhouwer network; PK-net; relation; parsimonious voice leading 2010 Mathematics Subject Classification:00A65;18B10 1.
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