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1.
In this paper, we establish some maximal inequalities for N-demimartingale. The maximal inequality for N-demimartingale is used as a key inequality to establish other results including the strong law of large numbers, strong growth rate and the integrability of supremum for N-demimartingale.  相似文献   

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Maximal inequalities for demimartingales and a strong law of large numbers   总被引:2,自引:0,他引:2  
Chow's maximal inequality for (sub)martingales is extended to the case of demi(sub)martingales introduced by Newman and Wright (Z. Wahrsch. Verw. Geb. 59 (1982) 361–371). This result serves as a “source” inequality for other inequalities such as the Hajek–Renyi inequality and Doob's maximal inequality and leads to a strong law of large numbers. The partial sum of mean zero associated random variables is a demimartingale. Therefore, maximal inequalities and a strong law of large numbers are obtained for associated random variables as special cases.  相似文献   

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Strong laws of large numbers have been stated in the literature for measurable functions taking on values on different spaces. In this paper, a strong law of large numbers which generalizes some previous ones (like those for real-valued random variables and compact random sets) is established. This law is an example of a strong law of large numbers for Borel measurable nonseparably valued elements of a metric space. Received: 24 February 1998 / Revised version: 3 January 1999  相似文献   

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Probability Theory and Related Fields -  相似文献   

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LetX 1,X 2, ... be a sequence of independent random variables with common lattice distribution functionF having zero mean, and let (S n ) be the random walk of partial sums. The strong law of large numbers (SLLN) implies that for any and >0
\alpha + \varepsilon n {\text{for some }}n \geqq m\} $$ " align="middle" vspace="20%" border="0">  相似文献   

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Summary LetX 1,X 2,..., be i.i.d. random variables andS n=X 1+X 2+. +X n. In this paper we simplify Rogozin's condition forS n/B n ±1for someB n+, which generalises Hinin's condition for relative stability ofS n. We also consider convergence of subsequences ofS n/B n. As an application of our methods, we extend a result of Chow and Robbins to show thatS n/B n±1 a.s. for someB n + if and only if 0<¦EX¦E¦X¦<+ .  相似文献   

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The strong law of large numbers for independent and identically distributed random variablesX i ,i=1, 2, 3,... with finite expectationE|X 1| can be stated as, for any >0, the number of integersn such that \varepsilon $$ " align="middle" border="0"> ,N is finite a. s. It is known thatEN < iffEX 1 2 < and that 2 EN var X1 as 0, ifE X 1 2 <. Here we consider the asymptotic behaviour ofEN (n) asn, whereN (n) is the number of integerskn such that \varepsilon $$ " align="middle" border="0"> andE N 1 2 =.  相似文献   

10.
An elementary proof of the strong law of large numbers   总被引:5,自引:0,他引:5  
Summary In the following note we present a proof for the strong law of large numbers which is not only elementary, in the sense that it does not use Kolmogorov's inequality, but it is also more applicable because we only require the random variables to be pairwise independent. An extension to separable Banach space-valuedr-dimensional arrays of random vectors is also discussed. For the weak law of large numbers concerning pairwise independent random variables, which follows from our result, see Theorem 5.2.2 in Chung [1].  相似文献   

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Translated from Matematicheskie Zametki, Vol. 50, No. 5, pp. 151–153, November, 1991.  相似文献   

12.
Let f(n) be a strongly additive complex-valued arithmetic function. Under mild conditions on f, we prove the following weighted strong law of large numbers: if X,X 1,X 2, … is any sequence of integrable i.i.d. random variables, then
$ \mathop {\lim }\limits_{N \to \infty } \frac{{\sum\nolimits_{n = 1}^N {f(n)X_n } }} {{\sum\nolimits_{n = 1}^N {f(n)} }} = \mathbb{E}Xa.s. $ \mathop {\lim }\limits_{N \to \infty } \frac{{\sum\nolimits_{n = 1}^N {f(n)X_n } }} {{\sum\nolimits_{n = 1}^N {f(n)} }} = \mathbb{E}Xa.s.   相似文献   

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In this paper, with the notion of independence for random variables under upper expectations, we derive a strong law of large numbers for non-additive probabilities. This result is a natural extension of the classical Kolmogorov’s strong law of large numbers to the case where the probability is no longer additive. As an application of our result, we give most frequent interpretation for Bernoulli-type experiments with ambiguity.  相似文献   

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Analogs of the Kolmogorov, Zygmund-Martsenkevich, and Brunk-Prokhorov strong law of large numbers are proved for martingales with continuous parameter. A new generalization of the Brunk—Prokhorov strong law of large numbers is given for martingales with discrete times. Along with convergence almost everywhere, we also prove the average convergence.  相似文献   

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Hilbert spaces are characterized through the validity of the strong law of large numbers. Other characterizations of Hilbert spaces are also given at the same time in this note.  相似文献   

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