Invited Papers -- George Boole, a Forerunner of Symbolic Computation -- Artificial Intelligence as a Decision Tool for Efficient Strategic and Operational Management -- OMDoc: Towards an Internet Standard for the Administration, Distribution, and Teaching of Mathematical Knowledge -- Contributed Papers and Poster Summaries -- On Communicating Proofs in Interactive Mathematical Documents -- Composite Distributive Lattices as Annotation Domains for Mediators -- A Proof Strategy Based on a Dual Representation -- Formalizing Rewriting in the ACL2 Theorem Prover -- Additional Comments on Conjectures, Hypotheses, and Consequences in Orthocomplemented Lattices -- Reasoning about the Elementary Functions of Complex Analysis -- Solving Nonlinear Systems by Constraint Inversion and Interval Arithmetic -- Basic Operators for Solving Constraints via Collaboration of Solvers -- Automatic Determination of Geometric Loci. 3D-Extension of Simson-Steiner Theorem -- Numerical Implicitization of Parametric Hypersurfaces with Linear Algebra -- A Note on Modeling Connectionist Network Structures: Geometric and Categorical Aspects -- A New Artificial Intelligence Paradigm for Computer-Aided Geometric Design -- How Symbolic Computation Can Benefit Computer-Aided Geometric Design -- CDR: A Rewriting Based Tool to Design FPLA Circuits -- Locally Effective Objects and Artificial Intelligence -- Negotiation Algorithms for Multi-agent Interactions -- Some Techniques of Isomorph-Free Search.