Subtyping with singleton types -- A subtyping for the Fisher-Honsell-Mitchell lambda calculus of objects -- The Girard Translation extended with recursion -- Decidability of higher-order subtyping with intersection types -- A ?-calculus structure isomorphic to Gentzen-style sequent calculus structure -- Usability: formalising (un)definedness in typed lambda calculus -- Lambda representation of operations between different term algebras -- Semi-unification and generalizations of a particularly simple form -- A mixed linear and non-linear logic: Proofs, terms and models -- Cut free formalization of logic with finitely many variables. Part I. -- How to lie without being (easily) convicted and the lengths of proofs in propositional calculus -- Monadic second-order logic and linear orderings of finite structures -- First-order spectra with one binary predicate -- Monadic logical definability of NP-complete problems -- Logics for context-free languages -- Log-approximable minimization problems on random inputs -- Convergence and 0-1 laws for L ?,? k under arbitrary measures -- Is first order contained in an initial segment of PTIME? -- Logic programming in Tau Categories -- Reasoning and rewriting with set-relations I: Ground completeness -- Resolution games and non-liftable resolution orderings -- On existential theories of list concatenation -- Completeness of resolution for definite answers with case analysis -- Subrecursion as a basis for a feasible programming language -- A sound metalogical semantics for input/output effects -- An intuitionistic modal logic with applications to the formal verification of hardware -- Towards machine-checked compiler correctness for higher-order pure functional languages -- Powerdomains, powerstructures and fairness -- Canonical forms for data-specifications -- An algebraic view of structural induction -- On the interpretation of type theory in locally cartesian closed categories -- Algorithmic aspects of propositional tense logics -- Stratified default theories -- A homomorphism concept for ?-regularity -- Ramified recurrence and computational complexity II: Substitution and poly-space -- General form recursive equations I -- Modal logics preserving admissible for S4 inference rules -- A bounded set theory with Anti-Foundation Axiom and inductive definability.