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1 Prologue When I was a graduate student looking for a thesis topic, Herbert Ryser advised me not to work on the projective plane of order 10. Even though he was extremely interested in this subject, he believed that it was too difficult and that I might get nowhere with it. I took his advice and chose another problem. Somehow, this problem has a beauty… (More)

Cellular uptake of 3H-heparin by cultured Chinese hamster ovary cells does not follow the pattern that would be expected on the basis of binding kinetics. It is essentially non-saturable and its low pinocytotic index is consistent with fluid-phase endocytosis, while surface binding is saturable and suggests the presence of specific receptors. Most of the… (More)

Let vectors vl.. .. . v,, be chosen at random from the + 1 vectors of length n. The probability that there is at least one +l vector in the subspace (over the reals) spanned by vr,. .. . v,, that is different from the fv, is shown to be 4(q)(z)'+O((jj)l) as n-+co, for p < n-lOn/(log n), where the constant implied by the O-notation is independent of p. The… (More)

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