Co-H-Spaces and Almost Localization

Cristina Costoya, Norio Iwase

Research output: Contribution to journalArticlepeer-review


Apart from simply connected spaces, a non-simply connected co-H-space is a typical example of a space X with a coaction of Bπ 1 (X) along rX : X → Bπ 1 (X), the classifying map of the universal covering. If such a space X is actually a co-H-space, then the fibrewise p-localization of rX (or the 'almost' p-localization of X) is a fibrewise co-H-space (or an 'almost' co-H-space, respectively) for every prime p. In this paper, we show that the converse statement is true, i.e. for a non-simply connected space X with a coaction of Bπ 1 (X) along rX , X is a co-H-space if, for every prime p, the almost p-localization of X is an almost co-H-space.

Original languageEnglish
Pages (from-to)323-332
Number of pages10
JournalProceedings of the Edinburgh Mathematical Society
Issue number2
Publication statusPublished - Oct 27 2014

All Science Journal Classification (ASJC) codes

  • Mathematics(all)


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