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Rigidity of Brillouin Zones

Kwakkel, F.H. (2006) Rigidity of Brillouin Zones. Master's Thesis / Essay, Mathematics.

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Abstract

In general, geometric properties of a manifold are not determined by topological invariants of this manifold. Starting in the 1960’s, however, a number of fascinating results have been proved that show that, under certain conditions, the topology of a manifold can determine its geometry. In this case, one often speaks of rigidity. The prototype rigidity theorem is due to Mostow [1]. This result, also known as the strong rigidity theorem, can be stated as Theorem 1.1 (Mostow’s Rigidity Theorem, 1968). Suppose M and N are closed manifolds of constant sectional curvature −1 with the dimension of M is at least 3. If 1(M) = 1 N), then M and N are isometric. In this thesis we study the rigidity of the focal decomposition of the flat 2-torus, as introduced and studied in [2]. We show that the focal decomposition determines the torus up to conformal equivalence.

Item Type: Thesis (Master's Thesis / Essay)
Supervisor:
Supervisor nameSupervisor E mail
Martens, MUNSPECIFIED
Degree programme: Mathematics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:28
Last Modified: 17 Apr 2019 09:41
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/8398

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