Vol. 18, December, 1999

• Completion of an Index Vector Set in Differential Algebra, Yu-Fu Chen and Hong-Qing Zhang, 1-8
• Vector Representations of Involutive Divisions, Yu-Fu Chen and Xiao-Shan Gao, 9-22
• Computations with Differential Rational Parametric Equations, Xiao-Shan Gao,23-29
• Geometric Constraint Solving with Conic, Xiao-Shan Gao and Kun Jiang, 30-47
• Geometric Constraint Solving with Linkages and Geometric Method for Polynomial Equations-Solving, Xiao-Shan Gao and Chang-Cai Zhu, 48-58
• “Russian Killer” No. 2: A Challenging Geometric Theorem with Human and Machine Proofs,Xiaorong Hou, Hongbo Li, Dongming Wang and Lu Yang, 59-71
• Hyperbolic Conformal Geometry with Clifford Algebra, Hongbo Li, 72-83
• Automated Ordering for Automated Theorem Proving in Elementary Geometry – Degree of Freedom Analysis Method, Hongbo Li and Mingteh Cheng, 84-97
• Spherical Conformal Geometry with Geometric Algebra, Hongbo Li, David Hestenes and Alyn Rockwood, 98-109
• A Universal Model for Conformal Geometries of Euclidean, Spherical and Double-Hyperbolic Spaces,Hongbo Li, David Hestenes and Alyn Rockwood, 110-130
• Coordinate-Free Projective Geometry for Computer Vision, Hongbo Li and Gerald Sommeri, 131-165
• Rational Solutions of Riccati-like Partial Differential Equations, Ziming Li and Fritz Schwarz, 166-187
• Cohomology of special 128-groups, Yujie Ma, 188-192
• Reduced form of Yang-Mills equation of SU(3) on R4,0, Shi He and Wu Yuchun, 193-199
• Zero Decomposition Algorithms for System of Polynomial Equations, Dingkang Wang, 200-207
• L¨uroth’s Theorem in Differential Case, Tao Xu and Xiao-Shan Gao, 208-211
• Development of An Object-Oriented Number System, Hong Yang, Zhuo-Jun Liu and Dong-Dai Lin,212-219