%0 Conference Article %T SPECTRA AND BOUND STATE OF THE ENERGY OPERATOR OF THREE-MAGNON SYSTEMS IN THE HEISENBERG MODEL IN THE TWO- AND THREE-DIMENSIONAL LATTICE %A Tashpulatov, S.M. %K three-magnon systems, bound states, Heisenberg model, essential spectra %J OPERATOR EQUATIONS AND SOME RELATED ISSUES IN APPLIED MATHEMATICS %D 2026 %P 5 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov