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A construction of noncontractible simply connected cell-like two-dimensional Peano continua
Katsuya Eda, Umed H. Karimov, Dušan Repovš (2007)
Fundamenta Mathematicae
Using the topologist sine curve we present a new functorial construction of cone-like spaces, starting in the category of all path-connected topological spaces with a base point and continuous maps, and ending in the subcategory of all simply connected spaces. If one starts from a noncontractible n-dimensional Peano continuum for any n > 0, then our construction yields a simply connected noncontractible (n + 1)-dimensional cell-like Peano continuum. In particular, starting from the circle 𝕊¹,...
A note on singularities in ANR's
W. Mitchell (1983)
Fundamenta Mathematicae
Completely regular mappings with compact ANR fiber
Stephen Seidman (1971)
Fundamenta Mathematicae
Concerning locally homotopy negligible sets and characterization of -manifolds
H. Toruńczyk (1978)
Fundamenta Mathematicae
Equiconnectivity and Cofibrations I.
Ph. R. Heath, G.H. Norton (1981)
Manuscripta mathematica
Fixed point index theory for a class of nonacyclic multivalued maps [Book]
Zdzisław Dzedzej (1985)
Fixed point sets of maps homotopic to a given map.
Soderlund, Christina L. (2006)
Fixed Point Theory and Applications [electronic only]
Fixed point theorems of Rothe-type for Frum-Ketkov- and 1-set-contractions
H. Buley (1978)
Commentationes Mathematicae Universitatis Carolinae
General position properties in fiberwise geometric topology [Book]
Taras Banakh, Vesko Valov (2013)
Homological characterization of boundary set complements
Philip L. Bowers (1987)
Compositio Mathematica
La théorie des rétracts approximatifs et le théorème des points fixes de Lefschetz [Book]
Gilles Gauthier (1983)
Le théorème de Lefschetz pour les ANR approximatifs
Gilles Gauthier, Andrzej Granas (1982)
Colloquium Mathematicae
Les hyperespaces des rétractes absolus et des rétractes absolus de voisinage du plan
Robert Cauty, Tadeusz Dobrowolski, Helma Gladdines, Jan van Mill (1995)
Fundamenta Mathematicae
Local cohomological properties of homogeneous ANR compacta
V. Valov (2016)
Fundamenta Mathematicae
In accordance with the Bing-Borsuk conjecture, we show that if X is an n-dimensional homogeneous metric ANR continuum and x ∈ X, then there is a local basis at x consisting of connected open sets U such that the cohomological properties of Ū and bd U are similar to the properties of the closed ball ⁿ ⊂ ℝⁿ and its boundary . We also prove that a metric ANR compactum X of dimension n is dimensionally full-valued if and only if the group Hₙ(X,X∖x;ℤ) is not trivial for some x ∈ X. This implies that...
Mappings with 1-dimensional absolute neighborhood retract fibers
John Walsh, David Wilson (1983)
Fundamenta Mathematicae
On a stability theorem for the fixed-point property
Chung-wu Ho (1981)
Fundamenta Mathematicae
On shape and fundamental deformation retracts
Maria Moszyńska (1972)
Fundamenta Mathematicae
On the disjoint (0,N)-cells property for homogeneous ANR's
Paweł Krupski (1993)
Colloquium Mathematicae
A metric space (X,ϱ) satisfies the disjoint (0,n)-cells property provided for each point x ∈ X, any map f of the n-cell into X and for each ε > 0 there exist a point y ∈ X and a map such that ϱ(x,y) < ε, and . It is proved that each homogeneous locally compact ANR of dimension >2 has the disjoint (0,2)-cells property. If dimX = n > 0, X has the disjoint (0,n-1)-cells property and X is a locally compact -space then local homologies satisfy for k < n and Hn(X,X-x) ≠ 0.
On the Lefschetz fixed point theorem for multivalued weighted mappings
Robert Skiba (2001)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
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