Frontiers of Combining Systems

This book constitutes the refereed proceedings of the 13th International Symposium on Frontiers of Combining Systems, FroCoS 2021, held in Birmingham, UK, in September 2021.

Inhalt
Calculi and Unification.- A Datalog Hammer for Supervisor Verification Conditions Modulo Simple Linear Arithmetic.- Non-Disjoint Combined Unification and Closure by Equational Paramodulation.- Symbol Elimination and Applications to Parametric Entailment Problems.- On the copy complexity of width 3 Horn constraint systems.- Description Logics Restricted Unification in the Description Logic FL0.- Combining Event Calculus and Description Logic Reasoning via Logic Programming.- Semantic Forgetting in Expressive Description Logics.- Interactive Theorem Proving Improving Automation for Higher-order Proof Steps.- JEFL: Joint Embedding of Formal Proof Libraries.- Machine Learning Fast and Slow Enigmas and Parental Guidance.- Vampire With a Brain Is a Good ITP Hammer.- Satisfiability Modulo Theories Optimization Modulo Non-Linear Arithmetic via Incremental Linearization.- Quantifier Simplification by Unification in SMT.- Verification Algorithmic Problems in the Symbolic Approach to the Verification of Automatically Synthesized Cryptosystems.- Formal Analysis of Symbolic Authenticity.- Formal Verification of a Java Component Using the RESOLVE Framework.