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Integral cohomology of rational projection method patterns.

Hunton, J and Gähler, F and Kellendonk, J (2013) 'Integral cohomology of rational projection method patterns.', Algebraic & geometric topology., 13 (3). pp. 1661-1708.


We study the cohomology and hence K–theory of the aperiodic tilings formed by the so called “cut and project” method, that is, patterns in d –dimensional Euclidean space which arise as sections of higher dimensional, periodic structures. They form one of the key families of patterns used in quasicrystal physics, where their topological invariants carry quantum mechanical information. Our work develops both a theoretical framework and a practical toolkit for the discussion and calculation of their integral cohomology, and extends previous work that only successfully addressed rational cohomological invariants. Our framework unifies the several previous methods used to study the cohomology of these patterns. We discuss explicit calculations for the main examples of icosahedral patterns in R3 – the Danzer tiling, the Ammann–Kramer tiling and the Canonical and Dual Canonical D6 tilings, including complete computations for the first of these, as well as results for many of the better known 2–dimensional examples.

Item Type:Article
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Publisher statement:The deposited accepted manuscript is available under a Creative Commons CC-BY-NC-ND licence.
Date accepted:No date available
Date deposited:03 November 2020
Date of first online publication:2013
Date first made open access:03 November 2020

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