Riemann's Boundary Problem with Infinite Index: 67 (Operator Theory: Advances and Applications) - Hardcover

native settlement, in 1950 he graduated - as an extramural studen- from Groznyi Teachers College and in 1957 from Rostov University. He taught mathematics in Novocherkask Polytechnic Institute and its branch in the town of Shachty. That was when his mathematical talent blossomed and he obtained the main results given in the present monograph. In 1969 N. V. Govorov received the degree of Doctor of Mathematics and the aca­ demic rank of a Professor. From 1970 until his tragic death on 24 April 1981, N. V. Govorov worked as Head of the Department of Mathematical Anal­ ysis of Kuban' University actively engaged in preparing new courses and teaching young mathematicians. His original mathematical talent, vivid reactions, kindness bordering on self-sacrifice made him highly respected by everybody who knew him. In preparing this book for publication I was given substantial assistance by E. D. Fainberg and A. I. Heifiz, while V. M. Govorova took a significant part of the technical work with the manuscript. Professor C. Prather con­ tributed substantial assistance in preparing the English translation of the book. I. V. Ostrovskii. PREFACE The classic statement of the Riemann boundary problem consists in finding a function (z) which is analytic and bounded in two domains D+ and D-, with a common boundary - a smooth closed contour L admitting a continuous extension onto L both from D+ and D- and satisfying on L the boundary condition +(t) = G(t)-(t) + g(t).

The book gives the first complete presentation of two closely connected subjects that are now used in various branches of complex analysis. In the first part the theory of analytic functions of completely regular growth in an angle is developed. Being a natural extension of the classical theory of entire functions of completely regular growth, this theory possesses principally new features due to the influence of boundary values on the sides of the angle. The second part contains the theory of the Riemann boundary value problem with power type infinite index. Using the results obtained in the first part of the book, the author gives complete and efficient solutions to the problem in various natural classes of analytic functions. The solution to the well-known Paley problem on the growth of entire functions of finite order is given as one possible application.