Doble suspensión de bolas de homología.
A note on the homotopical characterization of Rn.
Approximation axiomatique à la théorie du bordisme
On the planarity of Peano generalized continua: An extension of a theorem of S. Claytor
We extend a theorem of S. Claytor in order to characterize the Peano generalized continua which are embeddable into the 2-sphere. We also give a characterization of the Peano generalized continua which admit closed embeddings in the Euclidean plane.
Exponential law for uniformly continous proper maps.
The purpose of this note is to prove the exponential law for uniformly continuous proper maps.
Embedding proper homotopy types
We show that the proper homotopy type of any properly c-connected locally finite n-dimensional CW-complex is represented by a closed polyhedron in (Theorem I). The case n - c ≥ 3 is a special case of a general proper homotopy embedding theorem (Theorem II). For n - c ≤ 2 we need some basic properties of “proper” algebraic topology which are summarized in Appendices A and B. The results of this paper are the proper analogues of classical results by Stallings [17] and Wall [20] for finite CW-complexes;...
One-relator groups and proper 3-realizability.
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