42 research outputs found

    On perfect subnormal subgroups of finite groups

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    Recent Developments of Speckle Pattern Interferometer for Bone Strain Measurement

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    Transcendental Brauer-Manin Obstruction on a Pencil Of Elliptic Curves

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    International audienceThis note gives an explicit example of transcendental Brauer-Manin obstruction to weak approximation. It has two features which the only previously known example of such obstruction did not have: the class in the Brauer group which is responsible for the obstruction is divisible, and the underlying algebraic variety is an elliptic surface (a K3 surface)
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