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Lucian Bădescu
Lucian Bădescu (21 June 1944 - 9 April 2023) was a Romanian mathematician in the field of algebraic geometry. His work concentrated on modifications, singularities, hyperplane sections and classification of projective varieties, applications of the deformation theory of singularities to problems of projective geometry, degenerations of surfaces and Barth-Lefschetz theorems.

Life
Lucian Bădescu was born in Văleni-Dimbovița, Romania

Scientific degrees:

1967 - Graduation from the University of Bucharest, Department of Mathematics. 1971 - Doctor in Mathematics at the University of Bucharest, with the thesis ``Rational contractions of algebraic varieties'', under the direction of Prof. G. Galbură

In 1981, Lucian Bădescu received the Stoilow Price of the Romanian Academy for the monograph "Algebraic surfaces" (in Romanian), Edit. Academiei Romane, Bucharest, 1981.

Field of interest: Algebraic Geometry (modifications, singularities, hyperplane sections and classification of projective varieties, applications of the deformation theory of singularities to problems of projective geometry, degenerations of surfaces, Barth-Lefschetz theorems)

Professional activity

 * 1967-1977 Assistant at the University of Bucharest, Department of Mathematics
 * 1977-1979 Lecturer at the University of Bucharest, Department of Mathematics
 * 1979-1984 Principal Researcher III at the Department of Mathematics of INCREST Bucharest
 * 1984-1990 Principal Researcher II at the Department of Mathematics of INCREST Bucharest
 * 1990-now Principal Researcher I (=Senior Researcher = Full Professor) at the Institute of Mathematics of the Romanian Academy, Bucharest
 * Since June 1995 Professor of Geometry at the University of Bucharest Department of Mathematics (full position), and Senior Researcher at the Institute of Mathematics of the Romanian Academy (half position)
 * 1981-1982 Annual Member of the Institute for Advanced Study (School of Mathematics), Princeton, U.S.A.

Visiting professor:

Invited speaker at the following Conferences of Algebraic Geometry: Berlin (1980, 1985, 1988), Cetraro (1990), Storuman (Sweden, 1990), L'Aquila (1992), Warsaw (1980, 1985), Bratislava (1980, 1984), Novosibirsk (1989), Oberwolfach (1981), Nuernberg (1994), Leiden (1997), Bedlewo (Poland, 1999), Genova (2001).
 * Humboldt University of Berlin (1974 - one month, 1994 - one month)
 * University of Bayreuth (1992, 1994, 1996, one month each time)
 * University Paris VII (1991 - three months)
 * University of Genova (1981 - two months, 1994 - one months, 1996 - one months, 1998 - one month)
 * University of Pisa (1991 - two weeks, 1993 - one month)
 * University of Ferrara (1972/73 - four months, 1993/94 - two months)
 * University of Trento (1991 - two months), Max-Planck-Institute Bonn (six months in 1997)
 * Université de Genève (1998 - one month)
 * University of Milano (1999 - two months)
 * University of California, Los Angeles (academic year 1999/2000).

Invited to deliver lectures at the Universities: Roma II (Italy, 1991, 1994), Ferrara (Italy, 1990, 1992, 1996, 1998), Genova (Italy, 1990, 1992, 1993, 1999, 2002), Trieste (Italy, 1993), Milano (Italy, 1991, 1994, 1999), Pisa (Italy, 1993, 1995), Napoli (Italy, 1981), Cottbus (Germany, 1994), Köln (Germany, 1997), Bochum (Germany, 1997), Göttingen (Germany, 1997), Berlin (Germany, 1993, 1997), Steklov Institute in Moskow (1980), Santa Barbara (USA, 2000), New Mexico, Albuquerque (USA, 2000), Washington University in Saint Louis (USA, 2000), Kansas University, Lawrence (USA, 2000).