Distance and Similarity Measures for Soft Sets

Details Distance and Similarity Measures for Soft Sets Distance and Similarity Measures for Soft Sets

2010-06-25

arxiv.org/abs/1006.4904v1

New Mathematics and Natural Computation, Volume: 6, Issue: 3(2010) pp. 321-334

Mathematics

Logic

14 pages, accepted manuscript, to appear in New Mathematics and Natural Computation

Scientific paper

10.1142/S1793005710001724

In [P. Majumdar, S. K. Samanta, Similarity measure of soft sets, New Mathematics and Natural Computation 4(1)(2008) 1-12], the authors use matrix representation based distances of soft sets to introduce matching function and distance based similarity measures. We first give counterexamples to show that their Definition 2.7 and Lemma 3.5(3) contain errors, then improve their Lemma 4.4 making it a corllary of our result. The fundamental assumption of Majumdar et al has been shown to be flawed. This motivates us to introduce set operations based measures. We present a case (Example 28) where Majumdar-Samanta similarity measure produces an erroneous result but the measure proposed herein decides correctly. Several properties of the new measures have been presented and finally the new similarity measures have been applied to the problem of financial diagnosis of firms.

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