Amirkabir University of Technology AUT Journal of Mathematics and Computing 2783-2449 4 1 2023 02 01 Finite non-solvable groups with few 2-parts of co-degrees of irreducible characters 87 89 4993 10.22060/ajmc.2022.21894.1119 EN Neda Ahanjideh Department of pure Mathematics, Faculty of Mathematical Sciences, Shahrekord University, P. O. Box 115, Shahrekord, Iran Journal Article 2022 10 30 For a character $ \chi $ of a finite group $ G $, the number $ \chi^c(1)=\frac{[G:{\rm ker}\chi]}{\chi(1)} $ is called the co-degree of $ \chi $. Let ${\rm Sol}(G)$ denote the solvable radical of $G$. In this paper, we show that if $G$ is a finite non-solvable group with $\{\chi^c(1)_2:\chi \in {\rm Irr}(G)\}=\{1,2^m\}$ for some positive integer $m$, then $G/{\rm Sol}(G)$ has a normal subgroup $M/{\rm Sol}(G)$ such that $M/{\rm Sol}(G)\cong {\rm PSL}_2(2^n)$ for some integer $n \geq 2$, $[G:M]$ is odd and $ G/{\rm Sol}(G) \lesssim {\rm Aut}({\rm PSL}_2(2^n))$. https://ajmc.aut.ac.ir/article_4993_849adde22cc47d87dd17945940c9db4b.pdf