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Mathematical Physics Problems: Thesaurus and Ontology

The work is devoted to the study of knowledge representation in the subject area “Equations of mixed type in the sections of mathematical physics”. Such comprehensive resources as Wikipedia, claim to be encyclopedic knowledge, but cannot provide informational support for in-depth research. This is a field of activity for specialists in specific areas of knowledge. The thesaurus and ontology are considered as a formal means of describing the subject area. This approach takes into account the peculiarities of knowledge representation in the domain, namely the presence and use of formulas as independent objects. Consideration of the domain features leads to a reduction in search noise and a reduction in search time within the framework of the constructed library. The use of thesaurus and ontology in the design of a digital semantic library is considered.