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Similar sublattices of the root lattice A4

Baake, Michael; Heuer, Manuela and Moody, Robert V. (2008). Similar sublattices of the root lattice A4. Journal of Algebra, 320(4) pp. 1391–1408.

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Similar sublattices of the root lattice A4 are possible [J.H. Conway, E.M. Rains, N.J.A. Sloane, On the existence of similar sublattices, Can. J. Math. 51 (1999) 1300–1306] for each index that is the square of a non-zero integer of the form m2+mn−n2. Here, we add a constructive approach, based on the arithmetic of the quaternion algebra H(Q(√5)) and the existence of a particular involution of the second kind, which also provides the actual sublattices and the number of different solutions for a given index. The corresponding Dirichlet series generating function is closely related to the zeta function of the icosian ring.

Item Type: Journal Article
Copyright Holders: 2008 Michael Baake
ISSN: 0021-8693
Project Funding Details:
Funded Project NameProject IDFunding Body
Combinatorics of Sequences and Tilings and its ApplicationsEP/D058465/1EPSRC (Engineering and Physical Sciences Research Council)
Keywords: similar sublattices; icosian ring; zeta function
Academic Unit/Department: Mathematics, Computing and Technology > Mathematics and Statistics
Mathematics, Computing and Technology
Item ID: 12883
Depositing User: Uwe Grimm
Date Deposited: 19 Jan 2009 08:21
Last Modified: 15 Jan 2016 09:17
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