文摘
英文文摘
首都师范大学学位论文原创性声明及授权使用声明
Chapter 0 Introduction
Chapter 1 Proof of Theorem A
1.1 Some algebraic preparations
1.2 Proof of Theorem A
Chapter 2 Proof of Theorem B
2.1 The rank theorem
2.2 Proof of theorem B in a special case
2.3 Proof of theorem B
2.4 A useful corollary
Chapter 3 Proof of Theorem C,D and E
3.1 The Proof of Theorem C
3.2 The Proof of Theorem D
3.3 The Proof of Theorem E
Bibliography
致谢