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Quasirecognition by prime graph of U3(q) where 2 < q = pα < 100 | ||
| International Journal of Group Theory | ||
| مقاله 7، دوره 1، شماره 3، آذر 2012، صفحه 51-66 اصل مقاله (350.8 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22108/ijgt.2012.1369 | ||
| نویسندگان | ||
| Seyed Sadegh Salehi Amiri* 1؛ Alireza Khalili Asboei1؛ Ali Iranmanesh2؛ Abolfazl Tehranian1 | ||
| 1Islamic Azad University | ||
| 2Tarbiat Modares University | ||
| چکیده | ||
| Let $G $ be a finite group and let $\Gamma(G)$ be the prime graph of G. Assume $2 < q = p^{\alpha} < 100$. We determine finite groups G such that $\Gamma(G) = \Gamma(U_3(q))$ and prove that if $q \neq 3, 5, 9, 17$, then $U_3(q)$ is quasirecognizable by prime graph, i.e. if $G$ is a finite group with the same prime graph as the finite simple group $U_3(q)$, then $G$ has a unique non-Abelian composition factor isomorphic to $U_3(q)$. As a consequence of our results, we prove that the simple groups $U_{3}(8)$ and $U_{3}(11)$ are $4-$recognizable and $2-$recognizable by prime graph, respectively. In fact, the group $U_{3}(8)$ is the first example which is a $4-$recognizable by prime graph. | ||
| کلیدواژهها | ||
| prime graph؛ Element order؛ simple group؛ linear group | ||
| مراجع | ||
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