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Let be a smooth fan and denote its set of endpoints by . Let be one of the following spaces: the natural numbers, the irrational numbers, or the product of the Cantor set with the natural numbers. We prove that there is a smooth fan such that is homeomorphic to and for every homeomorphism , the restriction of to is the identity. On the other hand, we also prove that if is any smooth fan such that is homeomorphic to complete Erdős space, then is necessarily homeomorphic to the Lelek fan; this adds to a 1989 result by Włodzimierz Charatonik.

生成讲解博客的中文版本

生成AI智能校验的中文版本