A fiberable continuum which is not nontrivially productable

TOPOLOGY AND ITS APPLICATIONS(2021)

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摘要
We construct a continuum X subset of R-3 such that there exists a continuous surjection f from X onto X with the inverse image of every point being of the same size as the continuum and such that for no topological space T whose every point has a nontrivial neighbourhood there exists a surjection from X onto X x T. In particular, f cannot be a composition of a surjection from X onto X x T and the projection onto X, where T is of the same size as the continuum and satisfies the above neighbourhood condition. (C) 2021 Published by Elsevier B.V.
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关键词
Fiberable space, Productable space, Product spaces, Inverse images, Surjection
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