In the Master's thesis of A.V. Ivanov, the multidimensional energy surface of cholesteric liquid crystals was constructed. In addition to this, the minima corresponding to the stable states and minimum energy paths (MEPs) corresponding to the Fréedericksz transitions were found. Methods for finding MEPs, saddle points and activation barriers were developed and software for the numerical calculations of the parameters in Fréedericksz transitions was implemented. The main results of this work are certainly of scientific interest and have been published in the journal Physical Review E. While working on his Master's thesis, Aleksei demonstrated his ability to work independently, showed interest in the scientific problems studied and was able to find solutions even when working in unfamiliar scientific fields. The computer software for the simulation of structural transitions in liquid crystals show his aptitude for programming whilst the analytical results which he obtained demonstrate his high-level understanding of Theoretical Physics. Finally, A.V. Ivanov has participated in scientific projects both at St Petersburg State University and RFBR. Therefore, I believe that the work can be evaluated as 'excellent' and A.V. Ivanov deserves to be awared the Master's degree in Physics.