A counterexample related to topological sums

Shuji Yamamoto, Atsushi Yamashita

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this paper we construct compact metric spaces X, Y which are topologically distinct but whose topological sums X square union sign X and Y square union sign Y are homeomorphic.

Original languageEnglish
Pages (from-to)3715-3719
Number of pages5
JournalProceedings of the American Mathematical Society
Issue number12
Publication statusPublished - 2006 Dec
Externally publishedYes


  • Counterexample
  • Disjoint union
  • Topological sum

ASJC Scopus subject areas

  • Mathematics(all)
  • Applied Mathematics


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