Brigitte Le Roux has a doctorate in mathematics ( specialty Statistics ) ( Faculty of Sciences in Paris , 1970) and holds an HDR in Applied Mathematics ( University of Paris Dauphine , 2000) . She is a member of the laboratory MAP5 ( Applied Mathematics Paris 5) of the University Paris Descartes . His research focuses on the geometric data analysis and its applications in social sciences and in particular to the analysis of questionnaires . Brigitte Le Roux is a member of the editorial board of the journal Mathematics and Humanities and the Acts of Research in Social Sciences .