36,714 research outputs found

    Seglearn: A Python Package for Learning Sequences and Time Series

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    Seglearn is an open-source python package for machine learning time series or sequences using a sliding window segmentation approach. The implementation provides a flexible pipeline for tackling classification, regression, and forecasting problems with multivariate sequence and contextual data. This package is compatible with scikit-learn and is listed under scikit-learn Related Projects. The package depends on numpy, scipy, and scikit-learn. Seglearn is distributed under the BSD 3-Clause License. Documentation includes a detailed API description, user guide, and examples. Unit tests provide a high degree of code coverage

    Tamagawa Numbers for Motives with (Non-Commutative) Coefficients

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    Let MM be a motive which is defined over a number field and admits an action of a finite dimensional semisimple \bq-algebra AA. We formulate and study a conjecture for the leading coefficient of the Taylor expansion at 00 of the AA-equivariant LL-function of MM. This conjecture simultaneously generalizes and refines the Tamagawa number conjecture of Bloch, Kato, Fontaine, Perrin-Riou et al. and also the central conjectures of classical Galois module theory as developed by Frƶhlich, Chinburg, M. Taylor et al. The precise formulation of our conjecture depends upon the choice of an order \A in AA for which there exists a `projective \A-structure' on MM. The existence of such a structure is guaranteed if \A is a maximal order, and also occurs in many natural examples where \A is non-maximal. In each such case the conjecture with respect to a non-maximal order refines the conjecture with respect to a maximal order. We develop a theory of determinant functors for all orders in AA by making use of the category of virtual objects introduced by Deligne

    Robust particle outline extraction and its application to digital on-line holography

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