Numerical Mathematics: A Journal of Chinese Universities (English Series) published quarterly. It is an international journal covering numerical methods, analysis and applications. The journal publishes original research papers in all branches of modern computational mathematics such as numerical linear algebra, numerical optimization, numerical differential equations and computational statistics. Papers containing new ideas, creative approaches and/or innovative applications as well as invited reviews are expected to appear regularly in the journal. The journal is sponsored by Nanjing University and the Ministry of Education of China