Abstract
We consider a family of inverse limits of inverse sequences of closed unit intervals with a single upper semi-continuous set-valued bonding function whose graph is an arc; the graph is the union of two line segments in \([0,1]^2\), both of which contain the origin (0, 0) and have positive slope. One of the segments extends to the top-boundary and the other to the right side boundary of \([0,1]\times [0,1]\). We show that there is a large subfamily \(\mathcal F\) of these bonding functions such that for each \(f\in \mathcal F\), the inverse limit of the inverse sequence of closed unit intervals using f as a single bonding function is homeomorphic to the Lelek fan.
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Banič, I., Erceg, G. & Kennedy, J. The Lelek Fan as the Inverse Limit of Intervals with a Single Set-Valued Bonding Function Whose Graph is an Arc. Mediterr. J. Math. 20, 159 (2023). https://doi.org/10.1007/s00009-023-02323-3
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DOI: https://doi.org/10.1007/s00009-023-02323-3