Abstract
In this article, we compare mappings of Pawlak’s lower and upper approximations of concepts with those proposed by Skowron and Stepaniuk. It is known that both approaches coincide for the standard rough inclusion, so we consider the case of an arbitrary rough inclusion function. Even if the approximation space investigated is based on an arbitrary non-empty binary relation, the lower approximation mappings are equal in both approaches. Nevertheless, the upper approximation mappings are different in general.
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Gomolińska, A. (2007). A Comparison of Pawlak’s and Skowron–Stepaniuk’s Approximation of Concepts. In: Peters, J.F., Skowron, A., Düntsch, I., Grzymała-Busse, J., Orłowska, E., Polkowski, L. (eds) Transactions on Rough Sets VI. Lecture Notes in Computer Science, vol 4374. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-71200-8_5
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DOI: https://doi.org/10.1007/978-3-540-71200-8_5
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