超富足半群上的偏序  

Partial Orders on Superabundant Semigroups

作　　者：龚俊[1] 任学明[1] 

机构地区：[1]西安建筑科技大学理学院,陕西西安710055

出　　处：《江南大学学报（自然科学版）》2014年第5期621-625,共5页Joural of Jiangnan University (Natural Science Edition)　

基　　金：国家自然科学基金项目(10971160)

摘　　要：定义了超富足半群上的偏序≤l,≤r及≤,并对在这些偏序下超富足半群S的一些性质进行讨论;在此基础上证明了≤l关于S上的乘法是相容的,当且仅当S为局部C-a半群。A market-oriented process is promoted by the IPO reform carried out in 2010 and 2012,making the under pricing rate dropped,however,the Chinext IPOs break phenomenon began to occur.Does this mean the enhancement of the efficiency of the GEM IPO pricing？ Examine whether the IPO issue price and the market price reflect the intrinsic value through goodness of fit,which results from variables of the value principal components regression model.Further more,for the first time apply market risk represented by VaR to the GEM IPO pricing.The empirical results show that VaR should be incorporated in the new IPO pricing mechanism in order to improve the pricing efficiency.

关 键 词：偏序 超富足半群 相容性 C-a半群 

分 类 号：O152.7[理学—数学]