Heinz Bauer (1928-2002) was one of the prominent figures in Convex Analysis and Potential Theory in the second half of the 20th century. The Bauer minimum principle and Bauer's work on Silov's boundary and the Dirichlet problem are milestones in convex analysis. Axiomatic potential theory owes him what is known by now as Bauer harmonic spaces. These Selecta collect more than twenty of Bauer's research papers including his seminal papers in Convex Analysis and Potential Theory. Above his research contributions Bauer is best known for his art of writing survey articles. Five of his surveys on different topics are reprinted in this volume. Among them is the well-known article Approximation and Abstract Boundary, for which he was awarded with the Chauvenet Price by the American Mathematical Association in 1980.

"This book is a jewel- it explains important, useful and deep topics in Algebraic Topology that you won't find elsewhere, carefully and in detail." Prof. Gunter M. Ziegler, TU Berlin

The series is devoted to the publication of monographs and high-level textbooks in mathematics, mathematical methods and their applications. Apart from covering important areas of current interest, a major aim is to make topics of an interdisciplinary nature accessible to the non-specialist. The works in this series are addressed to advanced students and researchers in mathematics and theoretical physics. In addition, it can serve as a guide for lectures and seminars on a graduate level. The series de Gruyter Studies in Mathematics was founded ca. 35 years ago by the late Professor Heinz Bauer and Professor Peter Gabriel with the aim to establish a series of monographs and textbooks of high standard, written by scholars with an international reputation presenting current fields of research in pure and applied mathematics. While the editorial board of the Studies has changed with the years, the aspirations of the Studies are unchanged. In times of rapid growth of mathematical knowledge carefully written monographs and textbooks written by experts are needed more than ever, not least to pave the way for the next generation of mathematicians. In this sense the editorial board and the publisher of the Studies are devoted to continue the Studies as a service to the mathematical community. Please submit any book proposals to Niels Jacob. Titles in planning include Flavia Smarazzo and Alberto Tesei, Measure Theory: Radon Measures, Young Measures, and Applications to Parabolic Problems (2019) Elena Cordero and Luigi Rodino, Time-Frequency Analysis of Operators (2019) Mark M. Meerschaert, Alla Sikorskii, and Mohsen Zayernouri, Stochastic and Computational Models for Fractional Calculus, second edition (2020) Mariusz Lemanczyk, Ergodic Theory: Spectral Theory, Joinings, and Their Applications (2020) Marco Abate, Holomorphic Dynamics on Hyperbolic Complex Manifolds (2021) Miroslava Antic, Joeri Van der Veken, and Luc Vrancken, Differential Geometry of Submanifolds: Submanifolds of Almost Complex Spaces and Almost Product Spaces (2021) Kai Liu, Ilpo Laine, and Lianzhong Yang, Complex Differential-Difference Equations (2021) Rajendra Vasant Gurjar, Kayo Masuda, and Masayoshi Miyanishi, Affine Space Fibrations (2022)

The series is devoted to the publication of monographs and high-level textbooks in mathematics, mathematical methods and their applications. Apart from covering important areas of current interest, a major aim is to make topics of an interdisciplinary nature accessible to the non-specialist. The works in this series are addressed to advanced students and researchers in mathematics and theoretical physics. In addition, it can serve as a guide for lectures and seminars on a graduate level. The series de Gruyter Studies in Mathematics was founded ca. 35 years ago by the late Professor Heinz Bauer and Professor Peter Gabriel with the aim to establish a series of monographs and textbooks of high standard, written by scholars with an international reputation presenting current fields of research in pure and applied mathematics. While the editorial board of the Studies has changed with the years, the aspirations of the Studies are unchanged. In times of rapid growth of mathematical knowledge carefully written monographs and textbooks written by experts are needed more than ever, not least to pave the way for the next generation of mathematicians. In this sense the editorial board and the publisher of the Studies are devoted to continue the Studies as a service to the mathematical community. Please submit any book proposals to Niels Jacob. Titles in planning include Flavia Smarazzo and Alberto Tesei, Measure Theory: Radon Measures, Young Measures, and Applications to Parabolic Problems (2019) Elena Cordero and Luigi Rodino, Time-Frequency Analysis of Operators (2019) Mark M. Meerschaert, Alla Sikorskii, and Mohsen Zayernouri, Stochastic and Computational Models for Fractional Calculus, second edition (2020) Mariusz Lemanczyk, Ergodic Theory: Spectral Theory, Joinings, and Their Applications (2020) Marco Abate, Holomorphic Dynamics on Hyperbolic Complex Manifolds (2021) Miroslava Antic, Joeri Van der Veken, and Luc Vrancken, Differential Geometry of Submanifolds: Submanifolds of Almost Complex Spaces and Almost Product Spaces (2021) Kai Liu, Ilpo Laine, and Lianzhong Yang, Complex Differential-Difference Equations (2021) Rajendra Vasant Gurjar, Kayo Masuda, and Masayoshi Miyanishi, Affine Space Fibrations (2022)

In June 1986 a symposium was held in Giessen on Modern Trends in Virology. It was initiated by the Deutsche Forschungsgemeinschaft, which had supported virus research for the past 18 years in the Sonderforschungsbereich 47 at the University of Giessen. The purpose of the meeting was to serve as a forum for the members of the Sonderforschungsbereich to discuss scientific topics of mutual interest with about 200 virologists that had come from various parts of Europe, the United States, and Japan. It was not by chance that the symposium took place shortly after the 60th birthday of Rudolf Rott, who had founded the Sonderforschungsbereich in 1968 and has been its speaker ever since. Without his vision and his never resting energy Giessen would not have gained the position in the field of virology that it has today. This Festschrift, which contains the contributions presented at the plenary sessions of the symposium, is therefore dedicated to Rudolf Rott. HEINZ BAuER HANS-DIETER KLENK CHRISTOPH SCHOLTISSEK Table of Contents A Genetic Approach to Determining Glycoprotein Topology: The Influenza B Virus NB Glycoprotein has an Extracellular NHz-Terminal Domain Containing two N-linked Carbohydrate Chains R. A. LAMB and M. A. WILLIAMS . . . . . . . . . . . . . . . . . . . . . . . . . 1 Paramyxovirus Metabolisms Associated with the Cytoskeletal Framework Y. NAGAI, T. ToYODA, and M. HAMAGUCHI . . . . . . . . . . . . . . . . . . . 15 Correlation of High Evolutionary Rate of Influenza A Viruses in Man with High Mutation Rate Measured in Tissue Culture: A Hypothesis P. PALESE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

_ .... _---------- ------------ Wahrend der letzten zehn Jahre konnte: man eine Neubelebung des Interesses fur die Potentialtheorie beobachten. Zwei Ursachen lassen dies verstandlich erscheinen: Einmal die innere Weiterentwicklung der Potentialtheorie. welche nach der Erfassung moeglichst umfangreicher Klassen von Differentialgleichungen und Kernen drangt, zum anderen die Entwicklung der Theorie der Markoffschen Prozesse und der vor allem durch die bahnbrechende Arbeit von G.A.HUNT erwirkte Bruckenschlag hinuber zur Potentialtheorie. Die genannte innere Entwicklung der Potentialtheorie hat, aufbauend auf Ideen von TAUTZ I} 9], I} 0], DOOB [!9] und BRELOT, zu einer Axiomatisierung der Theorie der harmonischen Funktionen ge- fuhrt mit dem Ziel eines gleichzeitigen Erfassens bereits vorliegen- der Resultate uber die Potentialtheorie RieTrlannscher Flachen und Greenscher Raume und einer Ausdehnung der Potentialtheorie der Laplace-Gleichung auf bislang unerforschte Klassen elliptischer Differentialgleichungen. A: m bekanntesten und a: m weitesten vollendet ist in dieser Richtung die in OS] dargestellte Theorie von BRELOT. Wichtige Erganzungen verdankt man der These 1}1] von MadaTrle, HERVE - Wahrend die Brelotsche Theorie ausschliesslich elliptische Gleichungen betrifft, bemuhten sich DOOB o]. KAMKE {1 und Verf. um die Einbeziehung auch parabolischer partieller Diffe- rentialgleichungen zweiter Ordnung.