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7a). By one criterions find this, criterions extensions some remark, is a p p l i c a b l e etc. 7a). number of preceding the criterions sections. (~,7)-expansions which In do n o t investigated. of e x t e n d i n g criterions is negative to p e r m i t to E n g e l ' s a method and three, a's criterions applied we p r e s e n t e d inequalities sets section, rationality, addition, (dj-1)(dj/bj) can be 2. 3 . M i s c e l l a n e o u s In to product. system thus the . 18) complete. 18) tions Therefore, qj+1 J and I.

Is thus by the established. choice of the sequence mj, x E Mz (a). I the these x n n. Let us n. ~) side says In U using sets. Therefore, concepts can extend Theo- we work particular, imply out Sal~t of that each obvious do n o t to w o r k n. reOne Nn(a;x)=En(a) for an with in adopt on Nn(a;x) almost a, En(a) extension this details [11~ + concept for this when several line. 2 Q invited that, lim finite. ~) lemma on absolutely preceding extended assumptions. the return Since is the respect Also~ before in .

YI' Y2' "''' Y n be with finite variables to E. YI' Y2' independent and expectation identiE. 12. finite the Let expectations Z j = I Then, = be independent E(Yj) and variances series + converges. "''' Y n Ej with j-2 v. J probability one, as n ~ + ~ , Vj=V(Yj). I~. distributed the normalized Zn (Y1 a finite, bility, whatever be + Y2 + "'" non-zero, the "'" is a k i n d - En)) converse * 0 . to T h e o r e m be indepehdent infinite and identi- expectation. Then + Yn)/an limit sequence of + (Yn [17, Y2 "''' Y ' n variables with variable have + YI' random = - E2) and Robbins random can not then result obtained Theorem cally - El) on a set a n > O.