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Ghostbusting and Property a John Roe and Rufus Willett
Let X be a metric space (we may allow +∞ as a value for some distances in X). We say that X has bounded geometry if, for each R > 0, there is a natural number N such that every ball of radius R in X contains at most N points. (In particular, X is discrete.) In this paper, we will consider bounded geometry metric spaces in this sense. Let X be such a space, and let `(X) denote the usual Hilbert ...
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ژورنال
عنوان ژورنال: BMJ
سال: 2007
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.39357.539213.be