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A Formal Model of the Intermediate Quantifiers “A Few”, “Several” and “A Little”

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Fuzzy Techniques: Theory and Applications (IFSA/NAFIPS 2019 2019)

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Abstract

In this paper, we extend the model of intermediate quantifiers by three new ones, namely “a few, a little” and “several”. We proved some of the fundamental properties of these quantifiers and relations to the other ones. We also demonstrate that they naturally fall in the generalized square of opposition.

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Notes

  1. 1.

    To improve readability of formulas, we quite often write the type only once in the beginning of the formula and then omit it. Alternatively, we write \(A\in { Form}_{\alpha }\) to emphasize that A is a formula of type \(\alpha \) and do not repeat its type again.

  2. 2.

    The special (derived) formula \(\varUpsilon _{oo} A_o\) says that \(A_o\) in every model has a non-zero truth value and \(\hat{\varUpsilon }_{oo} A_o\) that \(A_o\) has a general truth value (i.e., neither false 0, nor true 1).

  3. 3.

    Recall that \( \mathop {\pmb { \& }}\nolimits \) is interpreted by Łukasiewicz conjunction \(\otimes \) and \(\mathop {\pmb {\nabla }}\) is interpreted by Łukasiewicz disjunction \(\oplus \).

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Acknowledgements

The work was supported from ERDF/ESF by the project “Centre for the development of Artificial Intelligence Methods for the Automotive Industry of the region” No. CZ.02.1.01/0.0/0.0/17-049/0008414.

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Correspondence to Petra Murinová .

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Novák, V., Murinová, P. (2019). A Formal Model of the Intermediate Quantifiers “A Few”, “Several” and “A Little”. In: Kearfott, R., Batyrshin, I., Reformat, M., Ceberio, M., Kreinovich, V. (eds) Fuzzy Techniques: Theory and Applications. IFSA/NAFIPS 2019 2019. Advances in Intelligent Systems and Computing, vol 1000. Springer, Cham. https://doi.org/10.1007/978-3-030-21920-8_39

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