منابع مشابه
How Small Must Ill-distributed Sets Be?
Consider a set S ⊂ Z. Suppose that, for many primes p, the distribution of S in congruence classes mod p is far from uniform. How sparse is S forced to be thereby? A clear dichotomy appears: it seems that S must either be very small or possess much algebraic structure. We show that, if S ⊂ Z ∩ [0, N ] occupies few congruence classes mod p for many p, then either S has fewer than N elements or m...
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The article raises the issue of 'the right to be ill', formulated by Tadeusz Kielanowski, a Polish physician and humanist. According to him, the right to health should be supplemented by the principle which would serve the protection of people with diseases or disabilities. One-sided interpretation of 'the right to health' may result in various forms of intolerance and discrimination. This pape...
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The condition number of a problem measures the sensitivity of the answer to small changes in the input, where “small” refers to some distance measure. A problem is called illconditioned if the condition number is large, and it is called ill-posed if the condition number is infinity. It is known that for many problems the (normwise) distance to the nearest ill-posed problem is proportional to th...
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ژورنال
عنوان ژورنال: British Dental Journal
سال: 2001
ISSN: 0007-0610
DOI: 10.1038/sj.bdj.4801212a