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- W4286901864 abstract "We provide nearly optimal algorithms for online facility location (OFL) with predictions. In OFL, $n$ demand points arrive in order and the algorithm must irrevocably assign each demand point to an open facility upon its arrival. The objective is to minimize the total connection costs from demand points to assigned facilities plus the facility opening cost. We further assume the algorithm is additionally given for each demand point $x_i$ a natural prediction $f_{x_i}^{mathrm{pred}}$ which is supposed to be the facility $f_{x_i}^{mathrm{opt}}$ that serves $x_i$ in the offline optimal solution. Our main result is an $O(min{log {frac{neta_infty}{mathrm{OPT}}}, log{n} })$-competitive algorithm where $eta_infty$ is the maximum prediction error (i.e., the distance between $f_{x_i}^{mathrm{pred}}$ and $f_{x_i}^{mathrm{opt}}$). Our algorithm overcomes the fundamental $Omega(frac{log n}{log log n})$ lower bound of OFL (without predictions) when $eta_infty$ is small, and it still maintains $O(log n)$ ratio even when $eta_infty$ is unbounded. Furthermore, our theoretical analysis is supported by empirical evaluations for the tradeoffs between $eta_infty$ and the competitive ratio on various real datasets of different types." @default.
- W4286901864 created "2022-07-25" @default.
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- W4286901864 date "2021-10-17" @default.
- W4286901864 modified "2023-09-27" @default.
- W4286901864 title "Online Facility Location with Predictions" @default.
- W4286901864 hasPublicationYear "2021" @default.
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