• When the size of the work exceeds 1 m, angular errors become amplified in three dimensions at a rate of 5 μm/arc-sec/m. • In a typical situation, the global XYZ machine-coordinate system is defined ...
In a pair of papers posted online this month, a Ukrainian mathematician has solved two high-dimensional versions of the centuries-old “sphere packing” problem. In dimensions eight and 24 (the latter ...
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