Invited Talks.- Program Termination Analysis by Size-Change Graphs (Abstract).- SET Cardholder Registration: The Secrecy Proofs.- SET Cardholder Registration: The Secrecy Proofs.- Algorithms, Datastructures, and other Issues in Efficient Automated Deduction.- Algorithms, Datastructures, and other Issues in Efficient Automated Deduction.- Description, Modal and temporal Logics.- The Description Logic ALCNH R + Extended with Concrete Domains: A Practically Motivated Approach.- NExpTime-Complete Description Logics with Concrete Domains.- Exploiting Pseudo Models for TBox and ABox Reasoning in Expressive Description Logics.- Exploiting Pseudo Models for TBox and ABox Reasoning in Expressive Description Logics.- The Hybrid ?-Calculus.- The Hybrid ?-Calculus.- The Inverse Method Implements the Automata Approach for Modal Satisfiability.- The Inverse Method Implements the Automata Approach for Modal Satisfiability.- Deduction-Based Decision Procedure for a Clausal Miniscoped Fragment of FTL.- Deduction-Based Decision Procedure for a Clausal Miniscoped Fragment of FTL.- Tableaux for Temporal Description Logic with Constant Domains.- Tableaux for Temporal Description Logic with Constant Domains.- Free-Variable Tableaux for Constant-Domain Quantified Modal Logics with Rigid and Non-rigid Designation.- Free-Variable Tableaux for Constant-Domain Quantified Modal Logics with Rigid and Non-rigid Designation.- Saturation Based Theorem Proving, Applications, and Data Structures.- Instructing Equational Set-Reasoning with Otter.- NP-Completeness of Refutability by Literal-Once Resolution.- Ordered Resolution vs. Connection Graph resolution.- A Model-Based Completeness Proof of Extended Narrowing and Resolution.- A Model-Based Completeness Proof of Extended Narrowing and Resolution.-A Resolution-Based Decision Procedure for the Two-Variable Fragment with Equality.- A Resolution-Based Decision Procedure for the Two-Variable Fragment with Equality.- Superposition and Chaining for Totally Ordered Divisible Abelian Groups.- Superposition and Chaining for Totally Ordered Divisible Abelian Groups.- Context Trees.- Context Trees.- On the Evaluation of Indexing Techniques for Theorem Proving.- On the Evaluation of Indexing Techniques for Theorem Proving.- Logic Programming and Nonmonotonic Reasoning.- Preferred Extensions of Argumentation Frameworks: Query, Answering, and Computation.- Bunched Logic Programming.- A Top-Down Procedure for Disjunctive Well-Founded Semantics.- A Second-Order Theorem Prover Applied to Circumscription.- NoMoRe: A System for Non-Monotonic Reasoning with Logic Programs under Answer Set Semantics.- NoMoRe: A System for Non-Monotonic Reasoning with Logic Programs under Answer Set Semantics.- Propositional Satisfiability and Quantified Boolean Logic.- Conditional Pure Literal Graphs.- Evaluating Search Heuristics and Optimization Techniques in Propositional Satisfiability.- QuBE: A System for Deciding Quantified Boolean Formulas Satisfiability.- System Abstract: E 0.61.- Vampire 1.1.- DCTP - A Disconnection Calculus Theorem Prover - System Abstract.- DCTP - A Disconnection Calculus Theorem Prover - System Abstract.- Logical Frameworks, Higher-Order Logic, Interactive Theorem Proving.- More On Implicit Syntax.- Termination and Reduction Checking for Higher-Order Logic Programs.- P.rex: An Interactive Proof Explainer.- JProver: Integrating Connection-Based Theorem Proving into Interactive Proof Assistants.- Semantic Guidance.- The eXtended Least Number Heuristic.- System Description: SCOTT-5.- Combination of Distributed Search and Multi-Search in Peers-mcd.d.- Lotrec: The Generic Tableau Prover for Modal and Description Logics.- The modprof Theorem Prover.- A New System and Methodology for Generating Random Modal Formulae.- Equational Theorem Proving and Term Rewriting.- Decidable Classes of Inductive Theorems.- Automated Incremental Termination Proofs for Hierarchically Defined Term Rewriting Systems.- Decidability and Complexity of Finitely Closable Linear Equational Theories.- A New Meta-Complexity Theorem for Bottom-Up Logic Programs.- Tableau, Sequent, Natural Deduction Calculi and Proof Theory.- Canonical Propositional Gentzen-Type Systems.- Incremental Closure of Free Variable Tableaux.- Deriving Modular Programs from Short Proofs.- A General Method for Using Schematizations in Automated Deduction.- Automata, Specification, Verification, and Logics of Programs.- Approximating Dependency Graphs Using Tree Automata Techniques.- On the Use of Weak Automata for Deciding Linear Arithmetic with Integer and Real Variables.- A Sequent Calculus for First-Order Dynamic Logic with Trace Modalities.- Flaw Detection in Formal Specifications.- CCE: Testing Ground Joinability.- System Description: RDL Rewrite and Decision Procedure Laboratory.- lolliCoP — A Linear Logic Implementation of a Lean Connection-Method Theorem Prover for First-Order Classical Logic.- Nonclassical Logics.- Muscadet 2.3: A Knowledge-Based Theorem Prover Based on Natural Deduction.- Hilberticus - A Tool Deciding an Elementary Sublanguage of Set Theory.- STRIP: Structural Sharing for Efficient Proof-Search.- RACER System Description.