Mechanical Theorem Proving in Computational Geometry.- Computational Origami Construction of a Regular Heptagon with Automated Proof of Its Correctness.- Proving Geometric Theorems by Partitioned-Parametric Gr?bner Bases.- Computations of the Area and Radius of Cyclic Polygons Given by the Lengths of Sides.- Symbolic Solution of a Piano Movers Problem with Four Parameters.- Computing Curves Bounding Trigonometric Planar Maps: Symbolic and Hybrid Methods.- Towards Solving the Dynamic Geometry Bottleneck Via a Symbolic Approach.- On the Decidability of Tracing Problems in Dynamic Geometry.- Towards a Geometric-Object-Oriented Language.- Spatial Planning and Geometric Optimization: Combining Configuration Space and Energy Methods.- nD Polyhedral Scene Reconstruction from Single 2D Line Drawing by Local Propagation.- Planar Generalized Stewart Platforms and Their Direct Kinematics.