This book introduces systematically the operator method for the solution of the Schroedinger equation. This method permits to describe the states of quantum systems in the entire range of parameters of Hamiltonian with a predefined accuracy. The operator method is unique compared with other non-perturbative methods due to its ability to deliver in zeroth approximation the uniformly suitable estimate for both ground and excited states of quantum system. The method has been generalized for the application to quantum statistics and quantum field theory. In this book, the numerous applications of operator method for various physical systems are demonstrated. Simple models are used to illustrate the basic principles of the method which are further used for the solution of complex problems of quantum theory for many-particle systems. The results obtained are supplemented by numerical calculations, presented as tables and figures.

Song, chung ta khong the khong dung den ngon ngu cung nhu khong the hoan toan tach ly ra khoi khong khi chinh tri cua thoi dai. Van de dat ra la moi quan he giua hai linh vuc khong the khong dung den va khong the tach khoi nay. Neu chinh tri la nghe thuat van dung va thu dac quyen luc thi ngon ngu chung ta su dung da va dang chiu dung suc nang quyen luc ay nhu the nao? Va neu nhan loai da chung kien quyen luc cua ngon ngu qua anh huong cua cac nha hung bien co dai Hy Lap hay cac thuyet khach Dong phuong thi, trong the gioi hien dai, ngon ngu da the hien nhung quyen nang ay ra sao?