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A surjective mapping
between compact spaces is
said to be (see [Mackowiak 1979, Chapter 3 and 4, p. 12-28]):

- *atomic* provided that for each subcontinuum of such that
the
set is nondegenerate we have
;

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*Janusz J. Charatonik, Pawel Krupski and Pavel Pyrih*

*2001-11-30*