Abstract
Rough soft knowledge is a key approach to understand and model uncertain, vague and not clearly defined situations in a parametric manner. Graphs, hypergraphs and other algebraic structures can be discussed more precisely when upper and lower approximate relations of objects are to be dealt with soft set theory. In this article, the notion of rough approximations is integrated with other algebraic structures under soft environment. Certain types of rough soft relations, rough soft graphs, rough soft (RS) hypergraphs are introduced with significant properties and results. The properties reflexivity, symmetry, transitivity and their negation for RS relations are discussed in detail. RS relations are described as the Cartesian product of single and two different approximation spaces with same and distinct parametric sets. Different types of RS graphs and RS digraphs are defined using RS relations. The algebraic connectivity of certain operations of RS graphs is computed with upper and lower bounds. The notion of RS relations on sets of more than two elements is illustrated to define the structure of soft hypergraphs and RS hypergraphs. The concepts of linearity, duality, connectedness, 2-section and their relations in RS hypergraphs is demonstrated with with isomorphism properties. The importance of RS information is described with a group decision making problem for matching a list of authors to different fields. The out-performance and advantages of the proposed approach over other existing concepts of uncertainty are highlighted in detail.
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Sarwar, M., Zafar, F. & Akram, M. Novel group decision making approach based on the rough soft approximations of graphs and hypergraphs. J. Appl. Math. Comput. 69, 2795–2830 (2023). https://doi.org/10.1007/s12190-023-01855-x
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DOI: https://doi.org/10.1007/s12190-023-01855-x
Keywords
- Rough soft relations
- Rough soft graph
- Algebraic connectivity
- Rough soft hypergraph
- Linearity
- Isomorphism
- Group decision making