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A simple chain is a finite sequence
of open sets such that Li intersects Lj if
and only if . The terms of the sequence
are called the links of the chain. An
-chain is a chain each of whose links has
diameter less than . a continuum M is
chainable if, for each positive number ,
M can be covered by an -chain.
Janusz J. Charatonik, Pawel Krupski and Pavel Pyrih
2001-02-21