On a question of Borsuk concerning non-continuous retracts II
Kenneth Kellum (1976)
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Kenneth Kellum (1976)
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Lex Oversteegen, E. Tymchatyn (1984)
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A symmetric, idempotent, continuous binary operation on a space is called a mean. In this paper, we provide a criterion for the non-existence of mean on a certain class of continua which includes tree-like continua. This generalizes a result of Bell and Watson. We also prove that any hereditarily indecomposable circle-like continuum admits no mean.
Jack Goodykoontz, Sam Nadler (1984)
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J. Krasinkiewicz, Sam Nadler (1978)
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T. Maćkowiak (1975)
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Sam Nadler (1980)
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Kazuhiro Kawamura, Janusz Prajs (1991)
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