A suspension theorem for the proper homotopy and strong shape theories
A theory of proper shape for locally compact metric spaces
A Thom isomorphism for infinite rank Euclidean bundles.
A topological collapse number for all spaces
A topological version of Bertini's theorem
We give a topological version of a Bertini type theorem due to Abhyankar. A new definition of a branched covering is given. If the restriction of the natural projection π: Y × Z → Y to a closed set V ⊂ Y × Z is a branched covering then, under certain assumptions, we can obtain generators of the fundamental group π₁((Y×Z).
A topological version of the Schauder theorem
A Total Whitehead Torsion Obstruction to Fibering over the Circle.
A uniform approach to complexes arising from forests.
A Universal Proper G-Space.
A universal space for normal bundles of n-manifolds.
A Vanishing Theorem in Homological Algebra
A Whitehead product for track groups (II).
Two direct relations are exhibited between the Whitehead product for track groups studied in [4] and the generalized Whitehead product in the sense of Arkowitz. The problem of determining the order of the Whitehead square is posed and some computations given.
A Whitehead theorem in CG-shape
A WU formula for Euler mod 2 spaces
A Z-set unknotting theorem for Nöbeling spaces
We prove a Z-set unknotting theorem for Nöbeling spaces.
A4n-polyhedra with free homology.
Absolute suspensions and cones
Abstract homotopy theory in procategories
Abstract tangent functors
Acat invariant of quasi-commutative algebras. (L'invariant Acat des algèbres quasi-commutatives.)