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JOURNALS // Sibirskie Èlektronnye Matematicheskie Izvestiya [Siberian Electronic Mathematical Reports] // Archive

Sib. Èlektron. Mat. Izv., 2018 Volume 15, Pages 205–213 (Mi semr911)

This article is cited in 1 paper

Discrete mathematics and mathematical cybernetics

Greedy cycles in the star graphs

D. A. Gostevskya, E. V. Konstantinovabc

a St Petersburg Academic University, st. Khlopina, 8/3, 194021, St Petersburg, Russia
b Sobolev Institute of Mathematics, pr. Koptyuga, 4, 630090, Novosibirsk, Russia
c Novosibirsk State University, st. Pirogova, 2, 630090, Novosibirsk, Russia

Abstract: We apply the greedy approach to construct greedy cycles in Star graphs $S_n, n\geqslant 3,$ defined as Cayley graphs on the symmetric group $\mathrm{Sym}_n$ with generating set $t=\{(1\,i),2\leqslant i\leqslant n\}$ of transpositions. We define greedy sequences presented by distinct elements from $t$, and prove that any greedy sequence of length $k$, $2\leqslant k\leqslant n-1$, forms a greedy cycle of length $2\cdot3^{k-1}$. Based on these greedy sequences we give a construction of a maximal set of independent greedy cycles in the Star graphs $S_n$ for any $n\geqslant 3$.

Keywords: Cayley graph; Star graph; greedy sequence; greedy cycle.

UDC: 519.1

MSC: 05C25

Received October 10, 2017, published March 13, 2018

Language: English

DOI: 10.17377/semi.2018.15.020



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