Ein Satz über den Leray-Schauderschen Abbildungsgrad.
Eine Verallgemeinerung zum Jordan-Brouwerschen Satz.
El teorema del punto fijo sin homología: un enfoque combinatorio.
End homolgy and duality.
Epsilon Nielsen coincidence theory
We construct an epsilon coincidence theory which generalizes, in some aspect, the epsilon fixed point theory proposed by Robert Brown in 2006. Given two maps f, g: X → Y from a well-behaved topological space into a metric space, we define µ ∈(f, g) to be the minimum number of coincidence points of any maps f 1 and g 1 such that f 1 is ∈ 1-homotopic to f, g 1 is ∈ 2-homotopic to g and ∈ 1 + ∈ 2 < ∈. We prove that if Y is a closed Riemannian manifold, then it is possible to attain µ ∈(f, g) moving...
Epsilon Nielsen fixed point theory.
Equiconnectivity and Cofibrations I.
Equilibria in a class of games and topological results implying their existence.
We survey results related to the problem of the existence of equilibria in some classes of infinitely repeated two-person games of incomplete information on one side, first considered by Aumann, Maschler and Stearns. We generalize this setting to a broader one of principal-agent problems. We also discuss topological results needed, presenting them dually (using cohomology in place of homology) and more systematically than in our earlier papers.
Equivariant evaluation subgroups and Rhodes groups
Equivariant Nielsen theory
Equivariantly parallelizable manifolds.
Estimates for homological dimension of configuration spaces of graphs
We show that the homological dimension of a configuration space of a graph Γ is estimated from above by the number b of vertices in Γ whose valence is greater than 2. We show that this estimate is optimal for the n-point configuration space of Γ if n ≥ 2b.
Estimating Nielsen numbers on wedge product spaces.
Euler characteristics of 2-manifolds and light open maps
Euler Characteristics of Discrete Groups and G-Spaces.
Euler Characteristics of Groups: The p-Fractional Part.
Extension theory of infinite symmetric products
We present an approach to cohomological dimension theory based on infinite symmetric products and on the general theory of dimension called the extension dimension. The notion of the extension dimension ext-dim(X) was introduced by A. N. Dranishnikov [9] in the context of compact spaces and CW complexes. This paper investigates extension types of infinite symmetric products SP(L). One of the main ideas of the paper is to treat ext-dim(X) ≤ SP(L) as the fundamental concept of cohomological dimension...
Extensions of best approximation and coincidence theorems.
Extensions of maps to the projective plane.
-absorbing sequences in hyperspaces of subcontinua
Let denote a true dimension function, i.e., a dimension function such that for all . For a space , we denote the hyperspace consisting of all compact connected, non-empty subsets by . If is a countable infinite product of non-degenerate Peano continua, then the sequence is -absorbing in . As a consequence, there is a homeomorphism such that for all , , where denotes the pseudo boundary of the Hilbert cube . It follows that if is a countable infinite product of non-degenerate...