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Three-way preconcept and two forms of approximation operators

  • Mathematical methods in data science
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Abstract

Three-way decisions, as a better way than two-way decisions, has played an important role in many fields. As an extension of semiconcept, preconcept constitutes a new approach for data analysis. In contrast to preconcept, formal concept or semiconcept is too conservative about dealing with data. Hence, we want to further apply three-way decisions to preconcept. In this work, we introduce three-way preconcept by an example. This new notion combines preconcept with the assistant of three-way decisions. After that, we attain a generalized double Boolean algebra consisting of three-way preconcept. Furthermore, we give two form operators, approximation operators from lattice and set equivalence relation approximation operators, respectively. Finally, we present a conclusion with some summary and future issues that need to be addressed.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (61572011), the Natural Science Foundation of Hebei Province (A201820117), Hebei Graduate Innovation Project (CXZZSS2020004).

Funding

This work is supported by the National Natural Science Foundation of China (61572011), the Natural Science Foundation of Hebei Province (A201820117), Hebei Graduate Innovation Innovation Project (CXZZSS2020004).

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Correspondence to Yilin Cheng.

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Mao, H., Cheng, Y. & Liu, X. Three-way preconcept and two forms of approximation operators. Soft Comput 27, 855–865 (2023). https://doi.org/10.1007/s00500-022-07532-8

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  • DOI: https://doi.org/10.1007/s00500-022-07532-8

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