A note on Hausdorff measures of quasi-self-similar sets
Proc. Amer. Math. Soc. 100 (1987), 183-186
Primary 54H20; Secondary 28A75, 58F12
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Abstract: Sullivan has demonstrated that quasi-self-similarity provides a useful point of view for the study of expanding dynamical systems. In [4, p. 57] he posed the question: Is the Hausdorff measure of a quasi-self-similar set positive and finite in its Hausdorff dimension? This paper answers both parts of this question. In the positivity is established for compact sets, and a lower bound is given for their Hausdorff measure. However, in the finiteness is disproved. In fact, a quasi-self-similar set is constructed for which the Hausdorff measure is actually -infinite.
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