TY CONF TI PROGRAM FOR ANALYSIS OF DIMENSIONAL AND QUALITY CHARACTERISTICS OF FOREST PRODUCTS HARVESTED USING MULTI-OPERATION FOREST MACHINES KW program KW timber KW assortment KW procurement KW multi-operational forest machine KW statistical characteristics JO OPERATOR EQUATIONS AND SOME RELATED ISSUES IN APPLIED MATHEMATICS AU Bakanach, E.A. AU Ugryumov, S.A. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov