Journal
FUZZY SETS AND SYSTEMS
Volume 406, Issue -, Pages 58-65Publisher
ELSEVIER
DOI: 10.1016/j.fss.2019.11.012
Keywords
Q-topological space; Power-set; Splitting Q-topology; Conjoining Q-topology
Funding
- Department of Science and Technology, New Delhi, India [DST/INSPIRE Fellowship/2017/IF170407]
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The article presents the characterization of exponential objects in topological spaces by Escardo and Heckmann, and further extends it to Q-topological spaces, emphasizing that the proof method is not based on category theory.
In 2001, Escardo and Heckmann gave a characterization of exponential objects in the category TOP of topological spaces (without using categorical concepts), as those topological spaces (Y, T) for which there exists an splitting-conjoining topology on C((Y, T), S), where S is the Sierpinski topological space with two points 1 and 0 such that {1} is open but {0} is not. Motivated by Escardo and Heckmann, in this paper, we have obtained a characterization of exponential objects in the category Q-TOP of Q-topological spaces introduced by Solovyov in 2008 (where Q is a fixed member of a fixed variety of Omega-algebras), as those Q-topological spaces (Y, sigma) for which there exists an splitting-conjoining Q-topology on [(Y, sigma), (Q, < id(Q)>)], where (Q, < id(Q)>) is the Q-Sierpinski space. In the proofs, our approach is not category theoretic, only some basic concepts of Q-topological spaces are required. (C) 2019 Elsevier B.V. All rights reserved.
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