53,911 research outputs found

    On Game Formats and Chu Spaces

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    It is argued that virtually all coalitional, strategic and extensive game formats as currently employed in the extant game-theoretic literature may be presented in a natural way as discrete nonfull or even-under a suitable choice of morphisms- as full subcategories of Chu (Poset 2).

    Surface chemistry

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    Title from folder label.Project report form no. 7 dated July 15, 1959. Possible method of increased absorbency of wood pulp products / C. Y. Chu -- Project report form no. 8 dated July 22, 1966. Possible method of increasing absorbency of wood pulp products / C. Y. Chu, Aurora del Rosario

    Improved bounds for randomized Schatten norm estimation of numerically low-rank matrices

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    In this work, we analyze the variance of a stochastic estimator for computing Schatten norms of matrices. The estimator extracts information from a single sketch of the matrix, that is, the product of the matrix with a few standard Gaussian random vectors. While this estimator has been proposed and used in the literature before, the existing variance bounds are often pessimistic. Our work provides a new upper bound and estimates of the variance of this estimator. These theoretical findings are supported by numerical experiments, demonstrating that the new bounds are significantly tighter than the existing ones in the case of numerically low-rank matrices
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