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- W2120728569 abstract "Using two results of Garkavi, Medvedev and Khavinson, we give sufficient conditions for proximinality of sums of two ridge functions with bounded and continuous summands in the spaces of bounded and continuous multivariate functions respectively. In the first case, we give an example which shows that the corresponding sufficient condition cannot be made weaker for some subsets of $mathbb{R}^{n}$. In the second case, we obtain also a necessary condition for proximinality. All the results are furnished with plenty of examples. The results, examples and following discussions naturally lead us to a conjecture on the proximinality of the considered class of ridge functions. The main purpose of the paper is to draw readers' attention to this conjecture." @default.
- W2120728569 created "2016-06-24" @default.
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- W2120728569 date "2007-08-29" @default.
- W2120728569 modified "2023-09-27" @default.
- W2120728569 title "On the proximinality of ridge functions" @default.
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