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leo-iii-1.0

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Project Description

*A massively parallel higher-order theorem prover* In the Leo-III project, we design and implement a state-of-the-art Higher-Order Logic Theorem Prover, the successor of the well known LEO-II prover [[2](http://dx.doi.org/10.1007/978-3-540-71070-7_14)]. Leo-III will be based on ordered paramodulation/superposition. In constrast to LEO-II, we replace the internal term representation (the commonly used simply typed lambda-calculus) by a more expressive system supporting type polymorphism. In order to achieve a substantial performance speed-up, the architecture of Leo-III will be based on massive parallelism (e.g. And/Or-Parallelism, Multisearch) [[3](http://dx.doi.org/10.1023/A:1018932114059)]. The current design is a multi-agent blackboard architecture that will allow to independently run agents with our proof calculus as well as agents for external (specialized) provers. Leo-III will focus right from the start on compatibility to the widely used TPTP infrastructure [[8](http://dx.doi.org/10.1007/s10817-009-9143-8)]. Moreover, it will offer built-in support for specialized external prover agents and provide external interfaces to interactive provers such as Isabelle/HOL [[5](http://dx.doi.org/10.1007/3-540-45949-9)]. The implementation will excessively use term sharing [[6](http://dl.acm.org/citation.cfm?id=1218621), [7](http://dl.acm.org/citation.cfm?id=1218620)] and several indexing techniques [[4](dx.doi.org/10.1007/3-540-45744-5_19), [9](dx.doi.org/10.1007/978-3-540-71070-7_14)]. Leo-III will also offer special support for reasoning in various quantified non-classical logics by exploiting a semantic embedding [[1](dx.doi.org/10.5220/0004324803460351)] approach.


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