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On the inverse best approximation property of systems of subspaces of a Hilbert space. (arXiv:2002.01959v1 [math.FA]) http://arxiv.org/abs/2002.01959
On the inverse best approximation property of systems of subspaces of a Hilbert space. (arXiv:2002.01959v1 [math.FA]) http://arxiv.org/abs/2002.01959