The 16 selected papers have been revised and updated for publication. They report recent research and findings in logic, philosophical logic, and connections between logic and computer science, with a heavy emphasis on work in Brazil and elsewhere in Latin America. The topics include the mathematical structure of logical syntax, a tableau calculus for Dummett predicate logic, and a modal framework for consequential implications and the factor law. The volume is not indexed. Annotation copyrighted by Book News, Inc., Portland, OR