Yvonne O. Stallings, "A charaterization of closed maps using the whyburn construction", International Journal of Mathematics and Mathematical Sciences, vol. 8, Article ID 986019, 3 pages, 1985. https://doi.org/10.1155/S0161171285000229
A charaterization of closed maps using the whyburn construction
In this paper we modify the Whyburn construction for a continuous function . If the range is first countable, we get a characterization of closed maps; namely, the constructions are the same if and only if the map is closed.
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