Transformations of biorthogonal systems and some of their applications. II (Q1357948)

From the introduction of the first part: ``In the second part of the article we shall consider the following questions. In section 4, transformations of the biorthogonal system of section 2 are obtained by means of another difference operator defined inside a square. But the operator here now is not invertible, in contrast to that of section 2. In section 5 we generalize results of previous sections. Here we apply essentially the theory of disconnected groups. In section 6, we consider a system of consecutive derivatives of a one-periodic meromorphic function. Here the system, biorthogonal to that of derivatives, is constructed in an explicit way''.