The book discusses the methods of mathematical physics related to the study of electrical engineering disciplines. The training manual complies with the requirements of state educational standards of VPO in the areas of training of certified specialists; 650900 (specialty 140601.65 "Electric power industry"), 654500 (specialties: 140601.65 "Electromechanics," 140602.65 "Electrical and electronic devices"); 654100 (specialty 210106 "Industrial Electronics") and bachelor's training areas: 140200.62.140600.62, 210100.62.