Mathematics – General Topology
Scientific paper
2005-07-12
Mathematics
General Topology
Scientific paper
In this paper, we show that a pointwise-symmetric isotonic closure function
is uniquely determined by the pairs of sets it separates. We then show that
when the closure function of the domain is isotonic and the closure function of
the codomain is isotonic and pointwise-symmetric, functions which separate only
those pairs of sets which are already separated are continuous.
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