A Semigroup of Simple Homotopy Types.
Computing crossed modules induced by an inclusion of a normal subgroup, with applications to homotopy 2-types.
Concerning the shape groups of compact metric spaces
Corrections to: “The algebraic topology of smooth algebraic varieties”
Erratum
Homotopy and homology groups of the n-dimensional Hawaiian earring
For the n-dimensional Hawaiian earring n ≥ 2, and is trivial for each 1 ≤ i ≤ n - 1. Let CX be the cone over a space X and CX ∨ CY be the one-point union with two points of the base spaces X and Y being identified to a point. Then for n ≥ 1.
Homotopy groups of arc complements in or Q
Homotopy types of one-dimensional Peano continua
Let X and Y be one-dimensional Peano continua. If the fundamental groups of X and Y are isomorphic, then X and Y are homotopy equivalent. Every homomorphism from the fundamental group of X to that of Y is a composition of a homomorphism induced from a continuous map and a base point change isomorphism.
Low dimensional homotopy groups of suspensions of the Hawaiian earring
We study the (n+1)st homotopy groups and the shape groups of the (n-1)-fold reduced and unreduced suspensions of the Hawaiian earring.
On the Growth of Homotopy Groups.
On the Space of Maps of a Closed Surface into the 2-Sphere.
Relative Homotopiegruppen bei Abbildungskegeln
Some Properties of the b-Product.
The algebraic topology of smooth algebraic varieties
The Homotopy Groups of an n-Fold Wedge.
The Unstable Decomposition of ...X and Its Applications.
Wedge cancellation of certain mapping cones