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Differentiation of n-Dimensional Additive Processes

Published online by Cambridge University Press:  20 November 2018

M. A. Akcoglu
Affiliation:
University of Toronto, Toronto, Ontario
A. Del Junco
Affiliation:
Ohio State University, Columbus, Ohio
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Let n ≧ 1 be an integer and let Rn be the usual n-dimensional real vector space, considered together with all its usual structure. The usual n-dimensional Lebesgue measure on Rn is denoted by λn. The positive cone of Rn is Rn+ and the interior of Rn + is Pn. Hence Pn is the set of vectors with strictly positive coordinates. A subset of Rn is called an interval if it is the cartesian product of one dimensional bounded intervals. If a, bRn then [a, b] denotes the interval {u|aub|. The closure of any interval I is of the form [a, b]; the initial point of I will be defined as the vector a. The class of all intervals contained in Rn+ is denoted by . Also, for each uPn, let be the set of all intervals that are contained in the interval [0, u] and that have non-empty interiors. Finally let enPn be the vector with all coordinates equal to 1.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1981

References

1. Akcoglu, M. A. and Chacon, R. V., A local ratio theorem, Can. J. Math. 22 (1970), 545552.Google Scholar
2. Akcoglu, M. A. and Krengel, U., A differentiation theorem for additive processes, Math. Z. 163 (1978), 199210.Google Scholar
3. Akcoglu, M. A. and Krengel, U., A differentiation theorem in Lp, Math. Z. 169 (1979), 3140.Google Scholar
4. Akcoglu, M. A. and Sucheston, L., A ratio ergodic theorem for superadditive processes, Z. Wahr. und verw. Geb. 44 (1978), 269278.Google Scholar
5. Dunford, N. and Schwartz, J. T., Convergence of almost everywhere of operator averages, J. Rat. Mech. and Anal. 5 (1956), 129178.Google Scholar
6. Terrell, T. R., Local ergodic theorems for n-parameter semi-groups of operators, in Contributions to ergodic theory and probability, Lecture notes in Math. 160 (Springer-Verlag, 1970), 262278.Google Scholar