Аннотация:The article discusses modern theories of the melting of two-dimensional systems based mainly onthe concepts of the Berezinsky–Kosterlitz–Thouless (BKT) theory of phase transitions in two-dimensionalsystems with continuous symmetries. The article provides a critical analysis of the approaches used to determine the parameters and type of transition using computer simulation methods. The methods are used to consider the melting in a system of soft disks with potential 1/r^n.