Cellular algebras.
Cellular covers of cotorsion-free modules
In this paper we improve recent results dealing with cellular covers of R-modules. Cellular covers (sometimes called colocalizations) come up in the context of homotopical localization of topological spaces. They are related to idempotent cotriples, idempotent comonads or coreflectors in category theory. Recall that a homomorphism of R-modules π: G → H is called a cellular cover over H if π induces an isomorphism , where π⁎(φ) = πφ for each (where maps are acting on the left). On the one hand,...
Centers of semigroup rings and conjugacy classes.
Centers of -isotypity in abelian groups
Central extensions and reciprocity laws
Central extensions of reductive groups by
Central sequences in the factor associated with Thompson’s group
We prove that the type factor generated by the regular representation of is isomorphic to its tensor product with the hyperfinite type factor. This implies that the unitary group of is contractible with respect to the topology defined by the natural Hilbertian norm.
Centralisateurs des éléments d'ordre fini dans le groupes de Greendlinger.
Centraliser dimension and universal classes of groups.
Centralizer near-rings acting on SE-groups.
Centralizer near-rings determined completely regular inverse semigroups.
Centralizers in symmetric inverse semigroups: Structure and order.
Centralizers of gap groups
A finite group G is called a gap group if there exists an ℝG-module which has no large isotropy groups except at zero and satisfies the gap condition. The gap condition facilitates the process of equivariant surgery. Many groups are gap groups and also many groups are not. In this paper, we clarify the relation between a gap group and the structures of its centralizers. We show that a nonsolvable group which has a normal, odd prime power index proper subgroup is a gap group.
Centralizers of Involutions in Locally Finite-Simple Groups
Centralizers of semisimple subgroups in locally finite simple groups
Centre-by-metabelian groups with a condition on infinite subsets.
Certain divisible hypergroups.
Certain embedding of the Burnside ring into its ghost ring
Certain Functional Equations on Groupoids Weaker than Quasigroups
Certain fundamental congruences on the tensor product of commutative inverse semigroups