Necessary and sufficient conditions in terms of lower cut sets are given for the insertion of a contra-α-continuous function between two comparable real-valued functions.
A necessary and sufficient condition in terms of lower cut sets is given for the insertion of a contra-α-continuous function between two comparable real-valued functions.
A necessary and sufficient condition in terms of lower cut sets are given for the insertion of a contra-continuous function between two comparable real-valued functions on such topological spaces that kernel of sets are open.
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