Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Mathematical Model of Representation of Heterogeneous Knowledge in the Information Subsystem of Management and Processing of Special-Purpose Information YU.YU. GROMOV, A.N. POTAPOV, A.L. NACHALOV A mathematical model of the representation of heterogeneous knowledge in the information subsystem of management and processing of special-purpose information is proposed. The correct construction of a subclass of deterministic and probabilistic models of knowledge representation for decision-making under conditions of uncertainty in the management and processing of information in decision support systems is provided. The proposed rules for constructing heterogeneous models somewhat complicate the final form of the model for deterministic knowledge, however, they allow using a single fuzzy logic algebra for data manipulation and a general fuzzy inference algorithm. Keywords: Information, knowledge, management, frame, model, information, formalization, system relations. DOI: 10.25791/pribor.8.2023.1429 Pp. 05-09.