Isaacs–Seitz conjecture for certain groups
Sajjad Mahmood Robati
Abstract
Sajjad Mahmood Robati
Abstract
Let G be a finite group. I. M. Isaacs and G. Seitz have conjectured that if G is a solvable group, then Taketa’s inequality dl(G)≤|cd(G)| holds, where cd(G) is the set of irreducible character degrees of G and dl(G) is the derived length of G. In this paper, we show that this inequality holds if G is a solvable Frobenius group. Also, we prove that if dl(G/P)≤|cd(G/P)| for some normal Sylow p-subgroup P of G, then dl(G)≤|cd(G)|. Moreover, we investigate this conjecture for some sets of the real-valued irreducible character degrees.
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Let G be a finite group. I. M. Isaacs and G. Seitz have conjectured that if G is a solvable group, then Taketa’s inequality dl(G)≤|cd(G)| holds, where cd(G) is the set of irreducible character degrees of G and dl(G) is the derived length of G. In this paper, we show that this inequality holds if G is a solvable Frobenius group. Also, we prove that if dl(G/P)≤|cd(G/P)| for some normal Sylow p-subgroup P of G, then dl(G)≤|cd(G)|. Moreover, we investigate this conjecture for some sets of the real-valued irreducible character degrees.
Key concepts: Mathematics, Sylow theorems, Conjecture, Combinatorics, Character (mathematics), Solvable group, Finite group, Group (periodic table)