**CLE 30 / XV EBL / XIV SLALM**

**CLE 30 YEARS - XV BRAZILIAN LOGIC CONFERENCE**

**XIV LATIN-AMERICAN SYMPOSIUM ON MATHEMATICAL LOGIC**

**May 11 - 17, 2008 - Paraty, RJ - Brazil**

The "CLE 30 YEARS/ XV Brazilian Logic Conference/ XIV Latin-American Symposium on Mathematical Logic", organized by the Centre for Logic, Epistemology and the History of Science (CLE) of the State University of Campinas (UNICAMP) and the Brazilian Logic Society (SBL), was held in Paraty, Brazil, from May 11th to 17th, 2008.

During the previous week, as it is traditional in the Latin-American Symposia, the Centre for Logic hosted the Logic School, aimed at advanced graduate students and other people interested in the study of logic and related areas. With approximately 50 participants, 6 Tutorials were held.

Outstanding names of the international scientific community took part in the event in Paraty, which counted with the participation of about 180 researchers from several academic and teaching institutions from São Paulo State, from other Brazilian states and from several countries as, for instance, Argentina, Belgium, Colombia, United States of America, The Netherlands, Italy, Mexico, Poland, Uruguay and Venezuela, exceeding in numbers all the previously held Brazilian Logic Conferences and Latin-American Symposia on Mathematical Logic.

The event was sponsored by the Centre for Logic, Epistemology and the History of Science, Brazilian Logic Society, Fundo de Apoio ao Ensino, à Pesquisa e à Extensão (FAEPEX-UNICAMP/Brazil), The State of São Paulo Research Foundation (FAPESP/Brazil), The National Council for Scientific and Technological Development (CNPq/Brazil), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES/Brazil), Association for Symbolic Logic and National Science Foundation (NSF/USA).

This special issue of CLE e-Prints contains extended abstracts of works presented at the conference, whose publication as pre-prints has been explicitly authorized by its authors.

**Walter A. Carnielli**** Marcelo E. Coniglio**** Itala M. Loffredo D'Ottaviano**** Chairs**