Preface The Fourth International Conference on Topological Algebras and Their Appli- cations was held in the city of Oaxaca, Mexico, from July 1 to 5, 2002. The main purpose of the meeting was to bring together the international group traditionally attending such conferences with Mexican specialists in the field of topological vec- tor spaces. Topics covered by the lectures included function algebras, various types of topological algebras (locally convex, locally pseudoconvex, nonconvex, Gelfand- Mazur, etc), locally convex and Banach spaces, spectral theory, and operator theory and related topics. This volume contains talks presented at the conference as well as articles re- ceived in response to a call for papers some are expository and provide new insights, while others contain new research. Most of them are addressed to mathematicians working in any area of analysis, interested in topological algebras or topological vector spaces. The Fourth International Conference on Topological Algebras and Their Ap- plications was jointly sponsored by the Consejo Nacional de Ciencia y Tecnologfa (grant 38610-E), the government of the state of Oaxaca, the Sociedad Matematica Mexicana, the Instituto Tecnologico Autonomo de Mexico, the Universidad AutO- noma Metropolitana, the Universidad Autonoma Benito Juarez de Oaxaca, and the Universidad Nacional Autonoma de Mexico. The editors would like to thank those who contributed to the success of the conference and the existence of this publication: the authors, the referees, and the American and Mexican Mathematical Societies. In particular, we thank Angel Carrillo and Ricardo Gomez, the coorganizers of the conference Martha Takane and Luis Gorostiza, editors of Aportaciones Matematicas and Leonardo Espinosa and Gabriela Sangines, who provided excellent technical assistance. The first three International Conferences on Topological Algebras and Their Applications were held in 1999 in Tartu, Estonia in 2000 in Rabat, Morocco and in 2001 in Oulu, Finland. We cherish the hope that this tradition will continue uninterrupted for many years. vii
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