arXiv math/06072922006-07-12math.RAmath.GR

The modular isomorphism problem for finite $p$-groups with a cyclic subgroup of index $p^2$

Czesław Bagiński, Alexander Konovalov

备注：: 8 pages
发表信息：: Groups St Andrews 2005. Vol.I, volume 339 of London Math. Soc. Lecture Note Ser., p.186-193. Cambridge Univ. Press, Cambridge, 2007

英文摘要：

Let $p$ be a prime number, $G$ be a finite $p$-group and $K$ be a field of characteristic $p$. The Modular Isomorphism Problem (MIP) asks whether the group algebra $KG$ determines the group $G$. Dealing with MIP, we investigated a question whether the nilpotency class of a finite $p$-group is determined by its modular group algebra over the field of $p$ elements. We give a positive answer to this question provided one of the following conditions holds: (i) $\exp G=p$; (ii) $\cl(G)=2$; (iii) $G'$ is cyclic; (iv) $G$ is a group of maximal class and contains an abelian subgroup of index $p$.

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