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Generalized wreath products of graphs and groups  [PDF]
Alfredo Donno
Mathematics , 2013,
Abstract: Inspired by the definition of generalized wreath product of permutation groups, we define the generalized wreath product of graphs, containing the classical Cartesian and wreath product of graphs as particular cases. We prove that the generalized wreath product of Cayley graphs of finite groups is the Cayley graph of the generalized wreath product of the corresponding groups.
A New Class of Subgroups of Symmetric Groups Using Wreath Products  [PDF]
Ram Parkash Sharma,Rajni Parmar
Mathematics , 2015,
Abstract: A new class of subgroups is obtained for symmetric groups using wreath products and graphical representation of the elements of wreath products in the set of signed Brauer diagrams.
Two problems on varieties of groups generated by wreath products
Vahagn H. Mikaelian
International Journal of Mathematics and Mathematical Sciences , 2002, DOI: 10.1155/s0161171202012528
Abstract: We outline results on varieties of groups generated by Cartesian and direct wreath products of abelian groups and pose two problems related to our recent results in that direction. A few related topics are also considered.
Embedding permutation groups into wreath products in product action  [PDF]
Cheryl E. Praeger,Csaba Schneider
Mathematics , 2011,
Abstract: The wreath product of two permutation groups G < Sym(Gamma) and H < Sym(Delta) can be considered as a permutation group acting on the set Pi of functions from Delta to Gamma. This action, usually called the product action, of a wreath product plays a very important role in the theory of permutation groups, as several classes of primitive or quasiprimitive groups can be described as subgroups of such wreath products. In addition, subgroups of wreath products in product action arise as automorphism groups of graph products and codes. In this paper we consider subgroups X of full wreath products Sym(Gamma) wr Sym(Delta) in product action. Our main result is that, in a suitable conjugate of X, the subgroup of Sym(Gamma) induced by a stabilizer of a coordinate delta in Delta only depends on the orbit of delta under the induced action of X on Delta. Hence, if the action of X on Delta is transitive, then X can be embedded into a much smaller wreath product. Further, if this X-action is intransitive, then X can be embedded into a direct product of such wreath products where the factors of the direct product correspond to the X-orbits in Delta. We offer an application of the main theorems to error-correcting codes in Hamming graphs.
Varieties generated by wreath products of abelian and nilpotent groups  [PDF]
Vahagn H. Mikaelian
Mathematics , 2015, DOI: 10.13140/2.1.2300.9607
Abstract: We present a survey of our recent research on varieties, generated by wreath products of groups. In particular, the full classification of all cases, when the (cartesian or direct) wreath product of any abelian groups $A$ and $B$ generates the product variety $\var{A} \var{B}$, is given. The analog of this is given for sets of abelian groups. We also present new, unpublished research on cases when the similar question is considered for non-abelian, finite groups.
Character correspondences for symmetric groups and wreath products  [PDF]
Anton Evseev
Mathematics , 2012,
Abstract: The Alperin--McKay conjecture relates irreducible characters of a block of an arbitrary finite group to those of its $p$-local subgroups. A refinement of this conjecture was stated by the author in a previous paper. We prove that this refinement holds for all blocks of symmetric groups. Along the way we identify a "canonical" isometry between the principal block of $S_{pw}$ and that of $S_p\wr S_w$. We also prove a general theorem on expressing virtual characters of wreath products in terms of certain induced characters. Much of the paper generalises character-theoretic results on blocks of symmetric groups with abelian defect and related wreath products to the case of arbitrary defect.
Twisted Burnside Theory for the Discrete Heisenberg Group and for Wreath Products of Some Groups  [PDF]
F. K. Indukaev
Mathematics , 2008,
Abstract: The RP-property of Fel'shtyn and Troitsky is proved for wreath products of finitely generated Abelian groups with the group of integers. Such wreath products become the first known example of finitely generated RP-groups being not almost polycyclic.
Wreath products of finite groups by quantum groups  [PDF]
Amaury Freslon,Adam Skalski
Mathematics , 2015,
Abstract: We introduce a notion of partition wreath product of a finite group by a partition quantum group, a construction motivated on the one hand by classical wreath products and on the other hand by the free wreath product of J. Bichon. We identify the resulting quantum group in several cases, establish some of its properties and show that when the finite group in question is abelian, the partition wreath product is itself a partition quantum group. This allows us to compute its representation theory, using earlier results of the first named author.
Distortion of wreath products in some finitely presented groups  [PDF]
Sean Cleary
Mathematics , 2005,
Abstract: Wreath products such as Z wr Z are not finitely-presentable yet can occur as subgroups of finitely presented groups. Here we compute the distortion of Z wr Z as a subgroup of Thompson's group F and as a subgroup of Baumslag's metabelian group G. We find that Z wr Z is undistorted in F but is at least exponentially distorted in G.
Representation zeta functions of wreath products with finite groups  [PDF]
Laurent Bartholdi,Pierre de la Harpe
Mathematics , 2008, DOI: 10.4171/GGD/81
Abstract: Let G be a group which has for all n a finite number r_n(G) of irreducible complex linear representations of dimension n. Let $\zeta(G,s) = \sum_{n=1}^{\infty} r_n(G) n^{-s}$ be its representation zeta function. First, in case G is a permutational wreath product of H with a permutation group Q acting on a finite set X, we establish a formula for $\zeta(G,s)$ in terms of the zeta functions of H and of subgroups of Q, and of the Moebius function associated with the lattice of partitions of X in orbits under subgroups of Q. Then, we consider groups W(Q,k) which are k-fold iterated wreath products of Q, and several related infinite groups W(Q), including the profinite group, a locally finite group, and several finitely generated groups, which are all isomorphic to a wreath product of themselves with Q. Under convenient hypotheses (in particular Q should be perfect), we show that r_n(W(Q)) is finite for all n, and we establish that the Dirichlet series $\zeta(W(Q),s)$ has a finite and positive abscissa of convergence s_0. Moreover, the function $\zeta(W(Q),s)$ satisfies a remarkable functional equation involving $\zeta(W(Q),es)$ for e=1,...,|X|. As a consequence of this, we exhibit some properties of the function, in particular that $\zeta(W(Q),s)$ has a singularity at s_0, a finite value at s_0, and a Puiseux expansion around s_0. We finally report some numerical computations for Q the simple groups of order 60 and 168.
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