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On sets of directions and angles determined by subsets of ${\Bbb R}^d$
directions and angles determined ${\Bbb R}^d$
2010/12/9
Given E Rd, d 2, de ne D(E) n xy jxyj : x; y 2 E o Sd1; the set of directions
determined by E. We prove that if the Hausdor dimension of E is greater than d
...