Schleiermachers Starrheitsbedingung für Projektivitäten in der Topologischen Geometric.
Schützenberger groups and Chebyshev polynomials.
Schützenberger groups of some even degree polynomials in S(R).
Schützenberger groups of some irregular ...-classes.
Semieffektive und D-Minimale Aktionen
Semigroup of Contractions of Wreath Products of Metric Spaces
In this paper semigroups of contractions of metric spaces are considered. The semigroup of contractions of the wreath product of metric spaces is calculated.
Semigroups and the n-sphere.
Semigroups for which the continuum congruences form finite chains.
Semigroups in which ... and ... coincide for regular elements.
Semigroups in which each -class contains at most one regular ...-class.
Semigroups of ...-density continuous functions.
Semigroups, ruled continua, and the fixed point property.
Semigroups which admit few embeddings
Semigroups whose regular ... -classes form well-ordered chains.
Semigroups whose regular J-classes form finite lattices.
Semigroups with exactly three regular ...-classes.
Semigroups with only finitely many regular ... -classes.
Separation properties for self-conformal sets
For a one-to-one self-conformal contractive system on with attractor K and conformality dimension α, Peres et al. showed that the open set condition and strong open set condition are both equivalent to . We give a simple proof of this result as well as discuss some further properties related to the separation condition.
Simplicity of Neretin's group of spheromorphisms
Denote by , , the regular tree whose vertices have valence , its boundary. Yu. A. Neretin has proposed a group of transformations of , thought of as a combinatorial analogue of the diffeomorphism group of the circle. We show that is generated by two groups: the group of tree automorphisms, and a Higman-Thompson group . We prove the simplicity of and of a family of its subgroups.
Some algebraic universal semigroup compactifications.