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Sampling in Grassmannians

机译:在Granchmannians中抽样

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摘要

We shall provide an overview of recent results on cubature points in Grassmannians. First, we consider the covering radius, which measures how well a finite point set covers the underlying space and observe that low-cardinality cubature points cover the Grassmannian asymptotically optimal. Therefore, cubature points are well-suited for several approximation tasks on the Grassmannian. Then we outline results on the approximation of integrals and functions on the Grassmannian via cubature point samples. Last, we connect frames for polynomial spaces with the concept of cubatures enabling a direct construction of cubature points.
机译:我们将概述最近的基地角度的结果。首先,我们考虑覆盖半径,这衡量了有限点集的覆盖程度如何覆盖底层空间并观察到低基数立方点覆盖基地渐近的渐近最佳。因此,Cubature点非常适合于基于Gransmannian上的近似任务。然后我们概述了通过Cubature Point样本对基层的积分和功能的近似值。最后,我们将多项式空间的框架与立方的概念连接,从而实现了立方点的直接构造。

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