This book constitutes the proceedings of the 20thInternational Conference on Logic for
Programming Artificial Intelligence andReasoning LPAR-20 held in November 2015 in Suva
Fiji. The 43 regular papers presented together with 1 invitedtalk included in this volume were
carefully reviewed and selected from 92submissions. The series of International Conferences on
Logic for Programming Artificial Intelligence and Reasoning LPAR is a forum where year after
year some of the most renowned researchers in the areas of logic automatedreasoning
computational logic programming languages and their applicationscome to present cutting-edge
results to discuss advances in these fields andto exchange ideas in a scientifically emerging
part of the world.
