On a plane compactum with the maximal shape
On a theorem of Baumslag, Dyer and Heller linking group theory and topology
On a theorem of P. S. Aleksandrov
On a theory of braided cochains in algebraic topology (Preliminary version). (Sur une théorie des cochaines tresses en topologie algébrique (Version préliminaire ).)
On bouquets
On categorical shape theory
On constructing resolutions over the polynomial algebras.
On fine shape theory II
On fundamental deformation retracts and on some related notions
On p-equivalences and p-universal spaces
On. positions of sets in spaces.
On relative homotopy groups of modules.
On shape and fundamental deformation retracts II
On shapes of topological spaces
On singular cut-and-pastes in the 3-space with applications to link theory.
In the study of surfaces in 3-manifolds, the so-called ?cut-and-paste? of surfaces is frequently used. In this paper, we generalize this method, in a sense, to singular-surfaces, and as an application, we prove that two collections of singular-disks in the 3-space R3 which span the same trivial link are link-homotopic in the upper-half 4-space R3 [0,8) keeping the link fixed. Throughout the paper, we work in the piecewise linear category, consisting of simplicial complexes and piecewise linear maps....
On some applications of infinite-dimensional manifolds to the theory of shape
On spaces which have the shape of C. W. complexes
On the categorical foundations of homological and homotopical algebra
On the categorical shape of a functor
On the connectivity of finite subset spaces
We prove that the space of nonempty subsets of cardinality at most k in a bouquet of m+1-dimensional spheres is (m+k-2)-connected. This, as shown by Tuffley, implies that the space is (m+k-2)-connected for any m-connected cell complex X.