This book constitutes the refereed proceedings of the 6th International Symposium on Frontiers of Combining Systems, FroCoS 2007, held in Liverpool, UK, September 2007. The 14 revised full papers presented were carefully selected and are organized in topical sections on combinations of logics, theories, and decision procedures; constraint solving and programming; combination issues in rewriting and programming as well as in logical frameworks and theorem proving systems.

This book constitutes the refereed proceedings of the 19th International Symposium on Fundamentals of Computation Theory, FCT 2013, held in Liverpool, UK, in August 2013. The 29 papers (26 full papers and 3 invited papers) were carefully reviewed and selected from 58 submissions. The papers cover the following topics: algorithms, formal methods, and emerging fields.