Books like their authors have their destinies. This book for the most part couldhavebeenwrittenearlier, butithappenedtobereleasedaslateasthe 21stcentury.Itisbasedonthenumerousfundamentalstudiesofmyteacher Kamil Sh. Khodzhaev. His disease prevented him from implementing his ideas in the form that he had been contemplating for years. It was me who tried to convey his concepts and ideas with the least possible distortions. This book contains a number of solutions worked out by Kamil Sh. Khodzhaev himself as well as problems solved by the authors jointly or separately. Kamil Sh. Khodzhaev founded...