Last week Keychron trotted out an ultra-slim wireless keyboard that folds in half for easy portability. At $64.99, the Keychron B11 Pro Ultra-Slim Wireless Foldable Keyboard is aimed squarely at Mac ...
Abstract: Deligne [9] showed that every K3 surface over an algebraically closed field of positive characteristic admits a lift to characteristic 0. We show the same is true for a twisted K3 surface.
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