6. Academic Visits

I have paid research visits to many institutions. Among these are the following (the lengths of the stays varied from 1 month to 6 months):

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Universidade de São Paulo, São Paulo, Brazil (1977, 1988)

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Cornell University, Ithaca, NY (1981, 1985, 1987, 1994)

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Attila Jozsef University, Szeged, Hungary (1981,1982)

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Eötvös Lorand University, Budapest, Hungary (1982, 1983, 1986, 1988)

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Universidad de Chile, Santiago, Chile (1984)

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Technische Hochschule Ilmenau, Ilmenau, (former) East Germany (1984)

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The Institute of Mathematics and its Applications, Minneapolis, USA (1987)

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Bell Communications Research, Morristown, New Jersey, USA (1987, 1989, 1990)

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CORE, Université Catholique de Louvain, Louvain-la-Neuve, Belgium (1989)

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Institute of Mathematics, Vien Toan Hoc, Hanoi, Vietnam (1991, 2003, 2005, 2007, 2009, 2012)

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Universidad Nacional de Buenos Aires und Universidad de Rosario, Argentinien (1993)

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Cornell University, Ithaca, NY, USA (1994)

Furthermore, in the course of cooperations and joint projects, I have paid many shorter reseach visits (3 days to 3 weeks) to institutions such as:
New York University, New York, USA; Université de Grenoble, Grenoble, Frankreich; Rice University, Houston, USA; Universiteit von Amsterdam and Tilburg Universiteit, Niederlande; University of Waterloo, Waterloo, Canada; Bell Communications Research Center, Morristown, USA; Istituto di Analisi dei Sistemi ed Informatica del CNR, Rome, Italy; Escuela Politécnica Nacional (EPN), Quito, Ecuador; University of Natural Sciences, Hanoi and Vietnam National University Ho Chi Minh City, Vietnam; Australian National University (ANU), Canberra, The University of New South Wales (UNSW), Sydney, University of Melbourne, Australia; Peking University, China; Academy of Mathematics Systems Science of the Chinese Academy of Sciences, Beijing, China; Universidad de Montevideo, Montevideo, Uruguay; Institute of Mathematics for Industry, Kyushu University, Fukuoka, Japan; Research Institute for Mathematical Sciences, Kyoto, Japan.