Three-way preconcept and two forms of approximation operators

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