3 papers
math.AT2020
Monoids of self-maps of topological spherical space forms
Daisuke Kishimoto, Nobuyuki Oda
A topological spherical space form is the quotient of a sphere by a free action of a finite group. In general, their homotopy types depend on specific actions of a group. We show t…
math.AT2019
Self-closeness numbers of finite cell complexes
Nobuyuki Oda, Toshihiro Yamaguchi
We reformulate the inequalities among self-closeness numbers of spaces in cofibrations making use of homology dimension and show that the self-closeness number of a space is less t…
math.AT2004
Splitting off Rational Parts in Homotopy Types
Norio Iwase, Nobuyuki Oda
It is known algebraically that any abelian group is a direct sum of a divisible group and a reduced group (See Theorem 21.3 of \cite{Fuchs:abelian-group}). In this paper, condition…