There are several notions and terms in Rough Set Theory not having a crystal clear definition. I discuss here two basic ones: Rough Set and Information System. The discussion will be lead by the two founding papers by Z. Pawlak. We will see that the term Information System has a narrow sense (the most used one in the rough set community) and a wide one (the world wide common use of information system and also Pawlak’s one). In case of the term Rough Set, several definitions are possible, none of them without problems. Some other minor issues related to Pawlak’s papers will be highlighted.
Ciucci, D. (2017). Back to the beginnings: Pawlak’s definitions of the terms information system and rough set. In G. Wang, A. Skowron, Y. Yao, D. Ślęzak, L. Polkowski (a cura di), Thriving Rough Sets (pp. 225-235). Springer Verlag [10.1007/978-3-319-54966-8_11].
Back to the beginnings: Pawlak’s definitions of the terms information system and rough set
CIUCCI, DAVIDE ELIO
2017
Abstract
There are several notions and terms in Rough Set Theory not having a crystal clear definition. I discuss here two basic ones: Rough Set and Information System. The discussion will be lead by the two founding papers by Z. Pawlak. We will see that the term Information System has a narrow sense (the most used one in the rough set community) and a wide one (the world wide common use of information system and also Pawlak’s one). In case of the term Rough Set, several definitions are possible, none of them without problems. Some other minor issues related to Pawlak’s papers will be highlighted.
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