Intermediate representation of hyperbolic manifolds by equidistant polyhedra
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DAMIAN, Florin, MAKAROV, Vitalii, MAKAROV, Piotr. Intermediate representation of hyperbolic manifolds by equidistant polyhedra. In: Conference on Applied and Industrial Mathematics: CAIM 2018, 20-22 septembrie 2018, Iași, România. Chișinău, Republica Moldova: Casa Editorial-Poligrafică „Bons Offices”, 2018, Ediţia a 26-a, pp. 92-93. ISBN 978-9975-76-247-2.
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Conference on Applied and Industrial Mathematics
Ediţia a 26-a, 2018
Conferința "Conference on Applied and Industrial Mathematics"
Iași, România, Romania, 20-22 septembrie 2018

Intermediate representation of hyperbolic manifolds by equidistant polyhedra


Pag. 92-93

Damian Florin1, Makarov Vitalii2, Makarov Piotr3
 
1 Moldova State University,
2 Lomonosov Moscow State University,
3 Moscow State Mining University
 
 
Disponibil în IBN: 1 iunie 2022


Rezumat

The n-dimensional hyperbolic manifold is usually considered as a homogeneous complex. One compact polytope is sucient to describe the manifold by pairwise identifying its faces. We discuss an "intermediate" way of representing the manifold by an equidistant (generalized) polyhedron over compact basis as a submanifold of codimension one. First such representation was proposed for a symmetric 3-submanifold of the Davis hyperbolic 4-manifold on regular 120-cells. A totally geodesic 2-submanifold (or border), which is a surface of genus 4 with a Platonic map f5; 5g, serves as a compact basis for equidistant polyhedra. We call them also lens hyperbolic polytopes. Remark that from the combinatorial point of view, the above Platonic surface f5; 5g of genus 4 is exactly the large star dodecahedron f5; 5=2g. For some equidistant polyhedra with elliptic, parabolic and hyperbolic incidences of hyperfaces at vertices, respectively over Platonic maps f4; 5g, f5; 4g, f5; 5g on surface of genus 4, we construct examples that lead to compact or non-compact hyperbolic 3-manifolds. The geometry of such manifolds is described. In dimension 4 the star regular polytope f5; 3; 5=2g, or 3-submanifold locally geodesic immersed in Davis 4-manifold, can be considered as a compact basis for an equidistant 4-dimensional polyhedron over Platonic map f5; 3; 5g. In a general case, we start with cells complexes over regular (semiregular or k-regular) maps on totally geodesic hyperbolic submanifolds and indicate pairs of faces of the lens polytope that lead to hyperbolic manifolds. Thus, using the proposed method, we construct manifolds starting from their submanifolds not, as usually, from fundamental polytopes. Algebraic aspects of this approach (embedding and extensions of the fundamental group) are discussed.