| 摘要: | 
	         
			 
		     | 本文研究了拟鞅Rosenthal型不等式的问题.利用好λ不等式得到拟鞅Rosenthal型不等式与值空间几何性质间的等价刻画,进而得到大数定律.这些结论丰富了已有结果. | 
	         
			
	         
				| 关键词:  Rosenthal 型不等式  拟鞅  几何性质 | 
	         
			 
                | DOI: | 
           
            
                | 分类号:O174.2 | 
             
			 
             
                | 基金项目:Supported by National Natural Science Foundation of China (11201354); Hubei Province Key Laboratory of Systems Science in Metallurgical Process (Wuhan University of Science and Technology) (Y201321) and National Natural Science Foundation of Pre-Research Item (2011XG005). | 
             
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                | ROSENTHAL TYPE INEQUALITY OF B-VALUED QUASI-MARTINGALE | 
           
           
			
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				ZHANG Chuan-zhou, PAN Yu, ZHANG Xue-ying
						
				
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				College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
				
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                | Abstract: | 
              
			
                | In this paper we discuss the Rosenthal type inequality of quasi-martingale. By using good λ inequality, we prove that Rosenthal type inequality of quasi-martingale and geometric properties of Banach space are equivalent. As a consequence, we prove the law of large numbers. These conclusions generalize some known results. | 
            
	       
                | Key words:  Rosenthal type inequality  quasi-martingale  geometric properties |