Saddle point theorems on generalized convex spaces.
Sandwich type theorems
Schauder fixed point theorem in spaces with global nonpositive curvature.
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.
Selection Theorem for Systems with Inheritance
The problem of finite-dimensional asymptotics of infinite-dimensional dynamic systems is studied. A non-linear kinetic system with conservation of supports for distributions has generically finite-dimensional asymptotics. Such systems are apparent in many areas of biology, physics (the theory of parametric wave interaction), chemistry and economics. This conservation of support has a biological interpretation: inheritance. The finite-dimensional asymptotics demonstrates effects of “natural”...
Selection theorems for partitions of Polish spaces
Selections and suborderability
We extend van Mill-Wattel's results and show that each countably compact completely regular space with a continuous selection on couples is suborderable. The result extends also to pseudocompact spaces if they are either scattered, first countable, or connected. An infinite pseudocompact topological group with such a continuous selection is homeomorphic to the Cantor set. A zero-selection is a selection on the hyperspace of closed sets which chooses always an isolated point of a set. Extending Fujii-Nogura...
Selections using orderings (non-separable case)
Selivanovski hard sets are hard
Let . For n ≥ 2, we prove that if Selivanovski measurable functions from to Z give as preimages of H all Σₙ¹ subsets of , then so do continuous injections.
Semicompatibility and fixed point theorems for reciprocally continuous maps in a fuzzy metric space.
Semicompatibility and fixed point theorems in an unbounded -metric space.
Semicompatibility and fixed point theorems in fuzzy metric space using implicit relation.
Semi-continuity of set-valued monotone mappings
Semi-contractions des espaces localement compacts et cas des variétés complexes
En nous inspirant d’articles de Beardon, nous donnons des résultats concernant les points fixes et les orbites d’auto-applications contractantes et semi-contractantes des espaces connexes localement compacts. Des résultats plus précis sont obtenus dans le cas des variétés complexes Kobayashi hyperboliques.
Semieffektive und D-Minimale Aktionen
Semigroup actions on tori and stationary measures on projective spaces
Let Γ be a subsemigroup of G = GL(d,ℝ), d > 1. We assume that the action of Γ on is strongly irreducible and that Γ contains a proximal and quasi-expanding element. We describe contraction properties of the dynamics of Γ on at infinity. This amounts to the consideration of the action of Γ on some compact homogeneous spaces of G, which are extensions of the projective space . In the case where Γ is a subsemigroup of GL(d,ℝ) ∩ M(d,ℤ) and Γ has the above properties, we deduce that the Γ-orbits...
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.