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The isomorphism between two fundamental groups by Cayley graphs

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LetG1 and G2 be two nite groups and letCay(G1,S1) and Cay(G2,S2) be the corresponding Cayley graphs of these groups, respectively. By [2] and [8], one can dene the fundamental groupπ1(Γ,v) by using any connected graph Γ with a fixed vertex v. In this paper we give sufficient conditions for any two fundamental groups which are obtained by Cayley graphs Cay(G1,S1) and Cay(G2,S2) to be isomorphic. At the final part of the paper, we present some examples of this result.

Abstract

LetG1 and G2 be two nite groups and letCay(G1,S1) and Cay(G2,S2) be the corresponding Cayley graphs of these groups, respectively. By [2] and [8], one can dene the fundamental groupπ1(Γ,v) by using any connected graph Γ with a fixed vertex v. In this paper we give sufficient conditions for any two fundamental groups which are obtained by Cayley graphs Cay(G1,S1) and Cay(G2,S2) to be isomorphic. At the final part of the paper, we present some examples of this result.

참고문헌 (11)

  1. G. Baumslag, "Topics in Combinatorial Group Theory, Lectures in Mathematics" (1993), Verlag
  2. D.E. Cohen, "Combinatorial Group Theory: a topological approach", LMS Student Texts, 14 (1989)
  3. R. Jajcay, "The Structure of Automorphism Groups of Cayley Graphs and Maps", J. of Alg. Comb, 12, pp.73~84 (2000)
  4. D.L. Johnson, "Presentation of groups", LMS Student Texts, 15 (1990)
  5. G. Karpilovsky, "The Schur Multiplier", London Math. Soc. Monographs Ser, 2 (1987)
  6. C.H. Li, "Isomorphisms of Cayley digraphs of Abelian groups", Bull. Austral. Math. Soc, 57, pp.181~188 (1998)
  7. C.H. Li, "Isomorphisms of Finite Cayley Digraphs of Bounded Valency", II Journal of Comb. Theory Series A, 87, pp.333~346 (1999)
  8. R.C. Lyndon, "Combinatorial Group Theory" (1977), Springer-Verlag
  9. J.P. Serre, "Trees" (1980), Springer-Verlag
  10. A.T. White, "Graphs, Groups and Surfaces" (1984), Elsevier Science Publishers B.V.
  11. R.J. Wilson, "Graph Theory" (1985), Longman Groups Ltd.

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