Automated Reasoning for Security Protocols -- Computer Deduction and (Formal) Proofs in Mathematics -- From Counter-Model-based Quantifier Instantiation to Quantifier Elimination in SMT -- The CADE-27 ATP System Competition - CASC-27 -- Unification modulo Lists with Reverse - Relation with Certain Word Equations -- On the Width of Regular Classes of Finite Structures -- Extending SMT solvers to Higher-Order Logic -- Superposition with Lambdas -- Restricted Combinatory Unification -- dLi: Definite Descriptions in Differential Dynamic Logic -- SPASS-SATT { A CDCL(LA) Solver -- GRUNGE: A Grand Unified ATP Challenge -- Model Completeness, Covers and Superposition -- A Tableaux Calculus for Default Intuitionistic Logic -- NIL: Learning Nonlinear Interpolants -- ENIGMA-NG: Efficient Neural and Gradient-Boosted Inference Guidance for E -- Towards Physical Hybrid Systems -- SCL -- Clause Learning from Simple Models -- Names are not just Sound and Smoke: Word Embeddings for Axiom Selection -- Computing Expected Runtimes for Constant Probability Programs -- Automatic Generation of Logical Models with AGES -- Automata Terms in a Lazy WSkS Decision Procedure -- Confluence by Critical Pair Analysis Revisited -- Composing Proof Terms -- Combining ProVerif and Automated Theorem Provers for Security Protocol Verification -- Towards Bit-Width-Independent Proofs in SMT Solvers -- On Invariant Synthesis for Parametric Systems -- The Aspect Calculus -- Uniform Substitution At One Fell Swoop -- A Formally Verified Abstract Account of Gödel's Incompleteness Theorems -- Old or Heavy? Decaying Gracefully with Age/Weight Shapes -- Induction in Saturation-Based Proof Search -- Faster, Higher, Stronger: E 2.3 -- Certified Equational Reasoning via Ordered Completion -- JGXYZ - An ATP System for Gap and Glut Logics -- GKC: a Reasoning System for Large Knowledge Bases -- Optimization Modulo the Theory of Floating-Point Numbers -- FAME(Q): An Automated Tool for Forgetting in Description Logics with Qualified Number Restrictions. .