ThisvolumecontainstheproceedingsofMPC2008, the9thInternationalConf- enceontheMathematicsofProgramConstruction.Thisseriesofconferencesaims to promote the development of mathematical principles and techniques that are demonstrably useful in the process of constructing computer programs, whether implemented in hardware or software. The focus is on techniques that combine precision with conciseness, enabling programs to be constructed by formal c- culation.Within this theme, the scopeofthe seriesisverydiverse, including p- grammingmethodology, programspeci?cationandtransformation, programming...

This book constitutes the refereed proceedings of the 4th International Conference on Interactive Theorem Proving, ITP 2013, held in Rennes, France, in July 2013. The 26 regular full papers presented together with 7 rough diamond papers, 3 invited talks, and 2 invited tutorials were carefully reviewed and selected from 66 submissions. The papers are organized in topical sections such as program verfication, security, formalization of mathematics and theorem prover development.