Let G be a finite group, and let Δ(G) be the prime graph built on the set of conjugacy class sizes of G: this is the simple undirected graph whose vertices are the prime numbers dividing some conjugacy class size of G, two vertices p and q being adjacent if and only if pq divides some conjugacy class size of G. In the present paper, we classify the finite groups G for which Δ(G) has a cut vertex.
Groups whose prime graph on class sizes has a cut vertex / Dolfi S.; Pacifici E.; Sanus L.; Sotomayor V.. - In: ISRAEL JOURNAL OF MATHEMATICS. - ISSN 0021-2172. - STAMPA. - 244:(2021), pp. 775-805. [10.1007/s11856-021-2193-2]
Groups whose prime graph on class sizes has a cut vertex
Dolfi S.;Pacifici E.;
2021
Abstract
Let G be a finite group, and let Δ(G) be the prime graph built on the set of conjugacy class sizes of G: this is the simple undirected graph whose vertices are the prime numbers dividing some conjugacy class size of G, two vertices p and q being adjacent if and only if pq divides some conjugacy class size of G. In the present paper, we classify the finite groups G for which Δ(G) has a cut vertex.File | Dimensione | Formato | |
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2021CutClasses.pdf
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CutVertexClassGraph.pdf
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