Naslov
Goldberg Coxeter construction for 3- or 4-valent plane maps

Autori
Dutour, Mathieu ; Deza, Mathieu

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni

Izvornik
Seminar of combinatorics, Hebrew university / - , 2004

Skup
Seminar of combinatorics, Hebrew university

Mjesto i datum
Jeruzalem, Izrael, 15.04.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Goldberg Coxeter construction; zigzag; central circuit

Sažetak
We consider the Goldberg-Coxeter construction GC(k, l, G0) (a generalization of a simplicial subdivision of Dodecahedron considered), which produces a plane graph from any 3- or 4-valent plane graph for integer parameters k, l. A zigzag in a plane graph is a circuit of edges, such that any two, but no three, consecutive edges belong to the same face ; a central circuit in a 4-valent plane graph G is a circuit of edges, such that no two consecutive edges belong to the same face. We study the zigzag (or central circuit) structure of the resulting graph using the algebraic formalism of the moving group, the (k, l)-product and a finite index subgroup of SL2(Z), whose elements preserve the above structure. We also study the intersection pattern of zigzags (or central circuits) of GC(k, l, G0) and consider its projections, obtained by removing all but one zigzags (or central circuits).

Izvorni jezik
Engleski

Znanstvena područja
Matematika

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