Near abelian profinite groups
-
Karl H. Hofmann
and
Francesco G. Russo
Abstract
A compact p-group G (p prime) is called near abelian if it contains an abelian normal subgroup A such that G/A has a dense cyclic subgroup and that every closed subgroup of A is normal in G. We relate near abelian groups to a class of compact groups, which are rich in permuting subgroups. A compact group is called quasihamiltonian (or modular) if every pair of compact subgroups commutes setwise. We show that for p ≠ 2 a compact p-group G is near abelian if and only if it is quasihamiltonian. The case p = 2 is discussed separately.
Funding source: Universitá degli Studi di Palermo
Award Identifier / Grant number: “Ex 60 % fondi di internazionalizzazione di ateneo”
Funding source: GNSAGA (Firenze, Italy)
Award Identifier / Grant number: travel support
We owe a great debt of gratitude to Wolfgang Herfort who shared with us a wealth of thoughts concerning the topic of this paper. His contributions have motivated us to reorganize our material several times and to compactify it down to its essentials. His contributions emerge in several parts of our text.
© 2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Near abelian profinite groups
- On Calabi–Yau threefolds associated to a web of quadrics
- On the partial fraction decomposition of the restricted partition generating function
- Projectively flat Finsler manifolds with infinite dimensional holonomy
- Weighted version of Carleson measure and multilinear Fourier multiplier
- Injective objects and retracts of Fraïssé limits
- On hypersurfaces containing projective varieties
- Additive reducts of algebraically closed valued fields
- On the subconvexity problem for GL(3) × GL(2) L-functions
- An algebraic property of Hecke operators and two indefinite theta series
- Sum formula of multiple Hurwitz-zeta values
- Classification of homogeneous holomorphic hermitian principal bundles over G/K
- Integrality properties of the CM-values of certain weak Maass forms
- Heat kernel for fractional diffusion operators with perturbations
- New class of multiple weights and new weighted inequalities for multilinear operators
- Balanced Hermitian geometry on 6-dimensional nilmanifolds
- Extensions of tame algebras and finite group schemes of domestic representation type
- Weighted estimates for multilinear Fourier multipliers
- Cluster tilting vs. weak cluster tilting in Dynkin type A infinity
- From ring epimorphisms to universal localisations
- Brauer algebras of type B
- Existence problems for the p-Laplacian
- Averaging operators over nondegenerate quadratic surfaces in finite fields
- Lawson homology for abelian varieties
Articles in the same Issue
- Frontmatter
- Near abelian profinite groups
- On Calabi–Yau threefolds associated to a web of quadrics
- On the partial fraction decomposition of the restricted partition generating function
- Projectively flat Finsler manifolds with infinite dimensional holonomy
- Weighted version of Carleson measure and multilinear Fourier multiplier
- Injective objects and retracts of Fraïssé limits
- On hypersurfaces containing projective varieties
- Additive reducts of algebraically closed valued fields
- On the subconvexity problem for GL(3) × GL(2) L-functions
- An algebraic property of Hecke operators and two indefinite theta series
- Sum formula of multiple Hurwitz-zeta values
- Classification of homogeneous holomorphic hermitian principal bundles over G/K
- Integrality properties of the CM-values of certain weak Maass forms
- Heat kernel for fractional diffusion operators with perturbations
- New class of multiple weights and new weighted inequalities for multilinear operators
- Balanced Hermitian geometry on 6-dimensional nilmanifolds
- Extensions of tame algebras and finite group schemes of domestic representation type
- Weighted estimates for multilinear Fourier multipliers
- Cluster tilting vs. weak cluster tilting in Dynkin type A infinity
- From ring epimorphisms to universal localisations
- Brauer algebras of type B
- Existence problems for the p-Laplacian
- Averaging operators over nondegenerate quadratic surfaces in finite fields
- Lawson homology for abelian varieties
