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July 8, 2014; 111 (27)

Cover image

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Cover image: Pictured are figures depicting networks of strings arising in the physics of a hypothetical six-dimensional universe. The middle two lines of the figure show networks of strings undergoing a discontinuous jump, proceeding from left to right. Andrew Neitzke describes how these jumps correspond to algebraic transformations, also known as mutations, which pertain to the field of cluster algebra. According to the author, characteristics of quantum field theory directly correspond to fundamental principles of cluster algebra. See the article by Neitzke, pp. 9717–9724, a part of the Many Facets of Cluster Algebras Special Feature. Images courtesy of Andrew Neitzke.

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