Propositional Proofs in Frege and Extended Frege Systems -- Circuit Complexity Meets Ontology-Based Data Access -- NEXP-Completeness and Universal Hardness Results for Justification Logic -- A Combinatorial Algorithm for the Planar Multi flow Problem with Demands Located on Three Holes -- Generalized LR Parsing for Grammars with Contexts -- On Compiling Structured CNFs to OBDDs -- Satisfiability of ECTL* with Tree Constraints -- On Growth and Fluctuation of k-Abelian Complexity -- A Polynomial-Time Algorithm for Outerplanar Diameter Improvement -- Editing to a Planar Graph of Given Degrees -- On the Satisfiability of Quantum Circuits of Small Treewidth -- Equations over Free Inverse Monoids with Idempotent Variables -- A Logical Characterization of Timed Pushdown Languages -- An In-place Priority Queue with O(1) Time for Push and lg n + O(1) Comparisons for Pop -- Resolution Complexity of Perfect Matching Principles for Sparse Graphs -- Operations on Self-verifying Finite Automata -- Automath Type Inclusion in Barendregt’s Cube -- Circuit Lower Bounds for Average-Case MA -- Making Randomness Public in Unbounded-Round Information Complexity -- First-Order Logic Definability of Free Languages -- Representation of (Left) Ideal Regular Languages by Synchronizing Automata -- Some Properties of Antistochastic Strings -- Approximation and Exact Algorithms for Special Cases of Connected f-Factors -- Rewriting Higher-Order Stack Trees -- Interacting with Modal Logics in the Coq Proof Assistant -- Delay Games with WMSOþU Winning Conditions -- Asymptotically Precise Ranking Functions for Deterministic Size-Change Systems.