Proceedings Sixth International Workshop on Logical Frameworks and Meta-languages: Theory and Practice Nijmegen, The Netherlands, August 26, 2011

This volume constitutes the proceedings of the Sixth International Workshop on Logical Frameworks and Meta-languages: Theory and Practice, LFMTP 2011. Logical frameworks and meta-languages form a common substrate for representing, implementing, and reasoning about a wide variety of deductive systems of interest in logic and computer science. Their design and implementation on the one hand and their use in reasoning tasks ranging from the correctness of software to the properties of formal computational systems on the other hand have been the focus of considerable research over the last two decades. The LFMTP workshop series, which resulted from the amalgamation of the Logical Frameworks and Meta-languages (LFM) and the Mechanized Reasoning about Languages with Variable Binding (MER?IN) workshop series, is intended to bring together designers, implementors, and practitioners to discuss various aspects impinging on the structure and utility of logical frameworks.