1975 PhD in mathematics (logic) at the Polish Academy of Sciences

1975-1981 Taught at Warsaw University, Bialystok Branch, Math Department.

1981-1995 Institute of Mathematics, Polish Academy of Sciences, Warsaw.

Fall 1987 Visiting scholar, Kaiserslautern University (Germany).

Spring 1988 Taught at Baruch College, CUNY, New York.

Since 1996 Warsaw University, Department of Philosophy.

Advanced Reasoning Forum, corresponding member 1999, O.K. member, since 2000


Papers on non-standard models of arithmetic, satisfaction definitions for them, on philosophical consequences of Godel's theorem, on non-classical logics.

Also: Co-chairman of the Polish Council of Christians and Jews, since 1990 Polish consultant to the American Jewish Committee, since 1992 Articles on Judaism, Jewish history, Jewish-Christian dialogue. Book Jews, Judaism, Poland (in Polish), 1997.