广义次指数族的卷积根的封闭性
王开永[1] 王岳宝[2] 张雅文[1]
[1]苏州科技学院应用数学系,江苏苏州215009 [2]苏州大学数学科学学院,江苏苏州215006
摘 要:
设F是支撑在(-∞,∞)上的分布函数.口是一个取有限个整数值的非负随机变量,F#v为F的U重卷积.在一定条件下,本文得到了如下结论:对任意0≤y〈∞,F#v∈S(y)茸F∈S(y).特别地,若口三挖,”≥2,本文得到了支撑在(一。。,。。)上的S(y)族的卷积根的封闭性.上述所得结果推广了[2]对应结果.[著者文摘]
文章出处:
《应用数学》-2007年20卷1期 -47-52页
分 类 号:
文献标识码:
A
文章编号:
1001-9847(2007)01-0047-06
The Closure of an Extensive Subexponential Distribution Class under Convolution Roots
WANG Kai-yong ,WANG Yue-bao,ZHANG Ya-wen (1. Department of Applied Mathematics, University of Science and Technology of Suzhou 215009, China 2. Department of Mathematics, Soochow University, Suzhou 215006, China)
Abstract:
Let F on (- ∞,∞) be a distribution function and F#v is the v- fold convolution of F, where v is a nonnegative random variable taking only a finite number of integer-values. Under certain conditions,the paper obtains the following result.for any 0≤ y∞,F#v S(y)→←F∈S(7). Particularly ,if v≡n ,n≥ 2, we give the closure of S(7) under convolution roots supported on (- ∞,∞). The above obtained results extend the corresponding results of E23.[著者文摘]
Key words:
Distribution class of S (y) Convolution roots Closure
基金资助:
国家自然科学基金(10271087);苏州科技学院引进人员科研启动赞(Z912)及院科研基金.

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