This volume consists of eight papers containing recent advances in interpolation theory for matrix functions and completion theory for matrices and operators. I

About one half of the papers in this volume are based on lectures which were pre sented at a conference at Leipzig University in August 1994, which was dedicate

Vladimir Petrovich Potapov, as remembered by colleagues, friends and former students.- On a minimum problem in function theory and the number of roots of an alg

This volume is devoted to Joseph A. (Joe) Ball’s contributions to operator theory and its applications and in celebration of his seventieth birthday. Joe Ball

Much of the importance of mathematics lies in its ability to provide theories which are useful in widely different fields of endeavour. A good example is the la