sentences:  He was a senator in the Italian Senate between 1983 and 1992 and 1994 and 1996 as a representative of the Independent Left and the Alliance of Progressives, respectively.He has three honorary degrees from the Universities of Buenos Aires, La Plata, the Catholic University of Cordoba.In 2005 he was elected member of the Italian National Academy of Sciences (Accademia Nazionale dei Lincei).