Abstract
In the literature, there are several graphs related to a finite group G. Two of them are the character degree graph, denoted by ΔG), and the prime graph ΓG), In this paper we classify all finite groups whose character degree graphs are disconnected and coincide with their prime graphs. As a corollary, we find all finite groups whose character degree graphs are square and coincide with their prime graphs.
Similar content being viewed by others
References
B. Huppert: Endliche Gruppen I. Die Grundlehren der Mathematischen Wissenschaften 134, Springer, Berlin, 1967. (In German.)
M. L. Lewis: Solvable groups whose degree graphs have two connected components. J. Group Theory 4 (2001), 255–275.
M. L. Lewis, Q. Meng: Square character degree graphs yield direct products. J. Algebra 349 (2012), 185–200.
M. L. Lewis, D. L. White: Connectedness of degree graphs of nonsolvable groups. J. Algebra 266 (2003), 51–76 (2003); corrigendum ibid. 290 (2005), 594–598.
C. P. Morresi Zuccari: Character degree graphs with no complete vertices. J. Algebra 353 (2012), 22–30.
D. L. White: Degree graphs of simple linear and unitary groups. Commun. Algebra 34 (2006), 2907–2921.
J. S. Williams: Prime graph components of finite groups. J. Algebra 69 (1981), 487–513.
Author information
Authors and Affiliations
Corresponding author
Additional information
The work of the second author was supported by Scientific Research Projects Coordination Unit of Istanbul University. The project number is 48029.
Rights and permissions
About this article
Cite this article
Erkoç, T., Yilmaztürk, U. & Güloğlu, İ.Ş. Finite groups whose character degree graphs coincide with their prime graphs. Czech Math J 68, 647–656 (2018). https://doi.org/10.21136/CMJ.2018.0553-16
Received:
Published:
Issue Date:
DOI: https://doi.org/10.21136/CMJ.2018.0553-16