Convex automorphisms of partial monounary algebras
Convex bodies and algebraic geometry [Book]
Convex cones and convex sets
Convex Functions on Dual Systems.
Convexity theories 0 fin. Foundations.
In this paper we study big convexity theories, that is convexity theories that are not necessarily bounded. As in the bounded case (see [4]) such a convexity theory Γ gives rise to the category ΓC of (left) Γ-convex modules. This is an equationally presentable category, and we prove that it is indeed an algebraic category over Set. We also introduce the category ΓAlg of Γ-convex algebras and show that the category Frm of frames is isomorphic to the category of associative, commutative, idempotent...
Dentable functions and radially uniform quasi-convexity.
Der Satz von Choquet-Bishop-de Leeuw für konvexe nicht kompakte Mengen straffer Maße.
Ein einfacher Beweis des Satzes von Euler-Schläfli.
Ein isoperimetrisches Problem mit Nebenbedingung.
Équivalences concernant la séparation de plusieurs cônes convexes
Erratum : Closures of faces of compact convex sets
Extremal and optimal solutions in the transshipment problem
The paper yields an investigation of the set of all finite measures on the product space with given difference of marginals. Extremal points of this set are characterized and constructed. Sets of uniqueness are studied in the relation to marginal problem. In the optimization problem the support of the optimal measure is described for a class of cost functions. In an example the optimal value is reached by an unbounded sequence of measures.
Extremal solutions of a general marginal problem
The characterization of extremal points of the set of probability measures with given marginals is given in the general context of a marginal system. The sets of marginal uniqueness are studied and an example is added to illustrate the theory.
Extreme Points of Convex Sets.
Freely solvable systems of linear inequalities
Generalized midset properties characterize geodesic circles and intervals
Harmonic sum and duality.
Infinite Dimensional Polytopes.
Isomorphismes de lattis de fermés convexes
Join Operations in Vector Spaces.