Decomposition Theorems for Semi-order Fuzzy Supermartingales and Submartingales

Based on semi - order fuzzy supermaringales andsubmartingales, the semi- order fuzzy supermartingaleand submartingale theory is developed. The main resultis to generalize the Doob decomposition and the Riesz de-composition theorems of standard martingale theory tosemi - order fuzzy supermaringales and submartingales.The structure of semi - order fuzzy supermaringales andsubmartingales and the conditions of that they has Doobdecomposition (resp. Riesz decomposition) are discussedin detail.     

Riesz Decomposition Theorems for Continuous-time Fuzzy Supermartingales

Compared with discrete-time fuzzy supermartingales, the structure and the properties of trajectories for continuous-time fuzzy supermartingales are more complex. This paper focuses on Riesz decomposition for continuous-time fuzzy supermartingales. The concepts of two types of Riesz decomposition (Riesz decomposition and level Riesz decomposition) are given and some necessary and sufficient conditions of that a continuous-time fuzzy supermartingale has Riesz decomposition are discussed in detail.     

Semi-order Fuzzy Supermartingales and Submartingales

There are some mathematical models(see Example2.4)and analogous results in standard martingale theorywhich can not be described by the usual fuzzy martingaletheory because of the lack of corresponding semi-orderin the fuzzy number space(E~n,D).In this paper,asuitable semi-order in the fuzzy number space(E~n,D)and the semi-order fuzzy supermartingale and submar-tingale are introduced,the charaterlstics of semi-ordersupermartingales and submartingales,as well as theDood's stopping theorem for them(the bounded stoppingtimes theorem and the general stopping times theoremfor a class of closable semi-order fuzzy supermartin-gales and submartingales)are established.     

一类连续时间的不完全金融市场中未定权益的定价

利用ElKaroui和Quenez建立的上鞅的可选分解定理讨论了一类连续时间的不完全金融市场中未定权益的定价，给出了其买方及卖方价格过程(定理2和定理3)，并对买方和卖方价格过程给出了一种合理的解释.     

非凸集值上鞅的收敛性

研究了非凸集值上鞅的收敛性.在supnE(d(0,Fn))< ∞的条件下,利用"截尾法"给出了非凸集值上鞅在Kuratowski收敛意义下的收敛定理.同时,研究了单调递增σ 域条件期望在K M意义下的收敛性.     

连续参数集值上鞅的收敛性

离散参数集值上鞅的收敛性已有诸多学者研究过。Hess．C．给出了无界集值上鞅在Kuratowski-Mosoo收敛意义下的收敛定理，笔者曾得到了在Kuratowski收敛意义下的类似结果，但对连续参数集值上鞅收敛性研究尚不多见。文中在给出连续参数集值上鞅在Kuratowski收敛意义下的收敛定理。     

TINA算法的收敛性

考虑了TINA算法的收敛性。在高维情形给出了算法收敛的条件,还给出了算法指数收敛的条件。在一维情形,发现对二次连续可微的位势算法总收敛。     

连续参数集值序上鞅及其表示定理

利用有关文献中超空间Ｐｂｆｃ（Ｘ）上一种新的半序给出了连续参数集值序上鞅概念,它是连续参数单点值上鞅的集值版本,并利用离散参数集值序上鞅的结果得到了连续参数集值序上鞅的表示定理     

Banach空间中集值上鞅的Ries＇z分解

将文献中在有限维Ｂａｎａｃｈ空间给出的集值上鞅存在Ｒｉｅｓ＇ｚ分解的充要条件推广到无限维Ｂａｎａｃｈ空间，同时在条件相当弱的情形下，得到了一个近似于Ｒｉｅｓ＇ｚ分解形式的结论．     

关于反向几乎上鞅的几个局部结果

本文作者研究了反向几乎上鞅与反向拟终上鞅的关系,从而扩展了鞅型序列的各种关系。作为特殊情形的反向上(下)鞅,还研究了反向上(下)鞅的局部收敛性和一致可积性。