edited by F. Koenigsberger and S. A. Tobias. edited by F. Koenigsberger, and S.A. Tobias. edited by M. Schnitzer and S. U. Khan. edited by C. Veeger and W.E. Newton. edited by H. Eggerer and R. Huber. edited by I. Gohberg and M. Kac. edited by L.O. Hertzberger and W. Hoogland. edited by M. Singer and J. P. Schade. edited by W. Kiefer and D.A. Long. edited by A. R. Butler and M. J. Perkins.