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Linear measures of some sets of the Cantor type

Published online by Cambridge University Press:  24 October 2008

Trevor J. Mcminn
Affiliation:
University of CaliforniaBerkeley

Extract

1. Introduction. Let 0 < λ < 1 and remove from the closed unit interval the open interval of length λ concentric with the unit interval. From each of the two remaining closed intervals of length ½(1 − λ) remove the concentric open interval of length ½λ(1 − λ). From each of the four remaining closed intervals of length ¼λ(1 − λ)2 remove the concentric open interval of length ¼λ(l − λ)2, etc. The remaining set is a perfect non-dense set of Lebesgue measure zero and is the Cantor set for λ = ⅓. Let Tλr be the Cartesian product of this set with the set similar to it obtained by magnifying it by a factor r > 0. Letting L be Carathéodory linear measure (1) and letting G be Gillespie linear square(2), Randolph(3) has established the following relations:

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1957

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References

REFERENCES

(1)Carathéodory, C.Über das lineare Mass von Punktmengen eine Verallgemeinerung das Längenbegriffs. Nachr. Ges. Wiss. Göttingen (1914), 404–26.Google Scholar
(2)Morse, A. P. and Randolph, J. F.Gillespie measure. Duke Math. J. 6 (1940), 408–19.CrossRefGoogle Scholar
(3)Randolph, J. F.Some properties of sets of the Cantor type. J. Lond. Math. Soc. 16 (1941), 3842.CrossRefGoogle Scholar