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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 and Pavel Pyrih
2000-09-21