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Superstring theory suggests a new cosmology whereby a long inflationary phase preceeded a non singular big bang-like event. After discussing how pre-big bang inflation naturally arises from an almost trivial initial state of the Universe, I will describe how present or near-future experiments can provide sensitive probes of how the Universe behaved in the pre-bang era.
An asymptotic test procedure, proposed by Bar-Hen (J. Multivariate Anal. 57 (1996) 266), for deciding if a given set of data Cheap Nike Free Shoes represents a new population or one of k a priori known populations, is extended to the case when the new population is described by more than one parameter.
The authors report five cases in which children sustained severe unintentional penetrating abdominal injuries caused by everyday household items. The five children required emergency surgical intervention. These injuries were potentially preventable. Careful supervision of children and their environment is necessary to prevent this type of injury and to ensure their well-being.
In this paper we determine the Euclidean distance matrix which is closest to a given (not necessarily Euclidian) one. We admit a wide class of appropriate matrix norms as measures of closeness. Majorization results on sums of eigenvalues of symmetric matrices serve as basic tools.
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