Invited Lecture -- A Relation-Algebraic Approach to Graph Structure Transformation -- Contributed Papers -- Emptiness Relations in Property Systems -- Pregroups: Models and Grammars -- Algebraic Semantics of ER-Models in the Context of the Calculus of Relations. II: Dynamic View -- Interpretability of First—Order Dynamic Logic in a Relational Calculus -- Relations in GUHA Style Data Mining -- Groups in Allegories -- Distributed Conceptual Structures -- A Computer Algebra Approach to Relational Systems Using Gröbner Bases -- Fuzzy Relational Images in Computer Science -- A Completeness Theorem for Extended Order Dependencies on Relational Attribute Models in Dedekind Categories -- Double Residuated Lattices and Their Applications -- Interval Bilattices and Some Other Simple Bilattices -- Interactive Systems: From Folklore to Mathematics -- Relational Constructions in Goguen Categories -- A Subintuitionistic Logic and Some of Its Methods -- Implementation of Relational Algebra Using Binary Decision Diagrams -- Calculating a Relational Program for Transitive Reductions of Strongly Connected Graphs -- Calculating Church-Rosser Proofs in Kleene Algebra -- On the Definition and Representation of a Ranking -- Tangent Circle Algebras.

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