劉玥雯,王才士,普麗琴
(西北師范大學數學與統計學院,甘肅蘭州730070)
2011年,X.J.Wang等[1]建立了 1 <p≤2 條件下的漸近幾乎負相協(AANA)隨機變量序列的Hájek-Rényi型不等式.Hájek-Rényi(簡稱 HR)型不等式是J.Hájek等[2]在1955年發現和證明的,定理內容是:若{Xn,n≥1}是獨立隨機變量序列且均值為零,{bn,n≥1}是一非負不減實數序列,那么對?ε>0和任意正整數m≤n有

這個不等式引起了不少學者的興趣.例如,B.L.S.Rao[3]給出了正相協(PA)隨機變量序列的H-R 型不等式,之后,S.H.Sung[4]改進了該不等式,并給出了一些應用;M.H.Ko等[5]應用 H-R型不等式得到AANA序列加權和的強大數定律.
定義 1[6]稱{Xn,n≥1}為 AANA 隨機變量序列,如果存在一個非負序列q(n)→0,對所有n,k≥1滿足

其中,f和g是使上式有意義,對各變元不降且使(1)式右端有限的函數.
AANA序列是一類非常廣泛的隨機變量序列,它包含負相協(NA)序列和相互獨立隨機變量序列.由于AANA序列在可靠性理論和多元統計分析中有著廣泛應用,所以研究AANA序列的收斂性和極限定理具有重要的實際意義,與其有關的應用也被更多的發現和推廣.例如,X.J.Wang等[1]得到了AANA序列的大偏差和Marcinkiewicz型強大數定律;T.K.Chandra等[6]獲得了 AANA序列加權平均的幾乎必然收斂;X.J.Wang等[7]給出了AANA序列部分和的強大數定律和強收斂速率;D.M.Yuan等[8]建立了 AANA序列部分和的Rosenthal型不等式等.
本文在3·2k-1<p≤4·2k-1的條件下建立了AANA隨機變量序列的H-R型不等式,并應用此不等式得到了AANA隨機變量序列的部分和收斂定理、強大數定律和上確界可積性定理.
為了證明本文的主要結論,需要給出以下引理.
引理 1[8]令{Xn,n≥1}是一列均值為零的AANA隨機變量序列,其混合系數為{q(n),n≥1},且p∈(3·2k-1,4·2k-1],整數k≥1.若<∞,則存在一個只依賴于p的非負常數Dp,使得對所有n≥1有






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