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universal

Let a class \mathcal S$ of spaces be given. A member U$ of \mathcal S$ is said to be universal for \mathcal S$ if every member of \mathcal S$ can be embedded in U$, i.e., if for every X \in \mathcal S$ there exists a homeomorphism h: X \to h(X) \subset U$. Accordingly, a dendrite is said to be universal if it contains a homeomorphic image of any other dendrite.
next up previous contents index
Next: weak cut point Up: Definitions Previous: uniquely arcwise connected
Janusz J. Charatonik, Pawel Krupski and Pavel Pyrih
2001-11-30