Results 1 to 10 of about 3,310 (97)
Computing symmetry groups of polyhedra [PDF]
, 2014 Knowing the symmetries of a polyhedron can be very useful for the analysis of its structure as well as for practical polyhedral computations. In this note, we study symmetry groups preserving the linear, projective and combinatorial structure of a ...
Bremner, David +4 more
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, 2020 We investigate the first-order theory of closed subspaces of complex Hilbert spaces in the signature $(\lor,\perp,0,1)$, where `$\perp$' is the orthogonality relation.
Fritz, Tobias
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Non-coherence of arithmetic hyperbolic lattices [PDF]
, 2010 We prove, under the assumption of the virtual fibration conjecture for arithmetic hyperbolic 3-manifolds, that all arithmetic lattices in O(n,1), n> 4, and different from 7, are non-coherent.
Bieri +17 more
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Non-Abelian Analogs of Lattice Rounding [PDF]
, 2015 Lattice rounding in Euclidean space can be viewed as finding the nearest point in the orbit of an action by a discrete group, relative to the norm inherited from the ambient space. Using this point of view, we initiate the study of non-abelian analogs of
Begelfor, Evgeni +2 more
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, 2014 We consider the analogue of Hurwitz curves, smooth projective curves $C$ of genus $g \ge 2$ that realize equality in the Hurwitz bound $|\mathrm{Aut}(C)| \le 84 (g - 1)$, to smooth compact quotients $S$ of the unit ball in $\mathbb{C}^2$.
Stover, Matthew
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Homotopy in statistical physics [PDF]
, 2006 In condensed matter physics and related areas, topological defects play important roles in phase transitions and critical phenomena. Homotopy theory facilitates the classification of such topological defects.
Kenna, Ralph
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, 2009 Kwai Man Fan proved that if the intersection lattice of a line arrangement does not contain a cycle, then the fundamental group of its complement is a direct sum of infinite and cyclic free groups.
Eran Liberman +9 more
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, 2002 We prove that the description of cubic functors is a wild problem in the sense of the representation theory. On the contrary, we describe several special classes of such functors (2-divisible, weakly alternative, vector spaces and torsion free ones).
Drozd, Yuriy
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Linearity and Compound Physical Systems: The Case of Two Separated Spin 1/2 Entities
, 2002 We illustrate some problems that are related to the existence of an underlying linear structure at the level of the property lattice associated with a physical system, for the particular case of two explicitly separated spin 1/2 objects that are ...
Aerts, Diederik, Valckenborgh, Frank
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Special subvarieties of non-arithmetic ball quotients and Hodge Theory
, 2020 Let $\Gamma \subset \operatorname{PU}(1,n)$ be a lattice, and $S_\Gamma$ the associated ball quotient. We prove that, if $S_\Gamma$ contains infinitely many maximal totally geodesic subvarieties, then $\Gamma$ is arithmetic.
Baldi, Gregorio, Ullmo, Emmanuel
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