• The Inria's Research Teams produce an annual Activity Report presenting their activities and their results of the year. These reports include the team members, the scientific program, the software developed by the team and the new results of the year. The report also describes the grants, contracts and the activities of dissemination and teaching. Finally, the report gives the list of publications of the year.

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## Section: Overall Objectives

### Objectives

The project-team investigates the design of logical frameworks, in order to ensure interoperability between proof systems, and to the development of system-independent proof libraries. To achieve these goals, we develop

• a logical framework Dedukti , where several theories can be expressed,

• tools to import proofs developed in external proof systems to Dedukti theories,

• tools to translate proofs from one Dedukti theory to another,

• tools to export proofs expressed in Dedukti theories to an external proof system,

• tools to prove the confluence, the termination, and the consistency of theories expressed in Dedukti ,

• tools to develop proofs directly in Dedukti ,

• an encyclopedia Logipedia of proofs expressed in various Dedukti theories.