普通型Bailey引理和 Riordan链

本文主要研究在超几何函数和Ramanujan-Rogers类型恒等式有非常重要作用的.Beilay引理和Riordan链的关系,证明了普通型Bailey引理本质上是一个特殊Riordan群的Riordan链.     

A Characterization of Counterexamples to the Kodaira-Ramanujam Vanishing Theorem on Surfaces in Positive Characteristic

The author gives a characterization of counterexamples to the Kodaira-Ramanujam vanishing theorem on smooth projective surfaces in positive characteristic. More precisely, it is reproved that if there is a counterexample to the Kodaira-Ramanujam vanishing theorem on a smooth projective surface X in positive characteristic, then X is either a quasi-elliptic surface of Kodaira dimension 1 or a surface of general type. Furthermore, it is proved that up to blow-ups, X admits a fibration to a smooth projective curve, such that each fiber is a singular curve.     

普通型二分性与Favard定理

本文我们首先推广了著名的Ｆａｖａｒｄ定理并指出对齐次线性概周期系统由Ｆａｖａｒｄ定理所得到的概周期解是平凡的。然后利用推广后的Ｆａｖａｒｄ定理和普通型二分性讨论了一类线性和非线性系统的概周期解存在性。Ｎａｋａｊｉｍａ在文〔３〕中的结果是我们的结果的一种特殊情形。