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- W2912842130 abstract "We exhibit a condition-based analysis of the adaptive subdivision algorithm due to Plantinga and Vegter. The first complexity analysis of the PV Algorithm is due to Burr, Gao and Tsigaridas who proved a $Obig(2^{tau d^{4}log d}big)$ worst-case cost bound for degree $d$ plane curves with maximum coefficient bit-size $tau$. This exponential bound, it was observed, is in stark contrast with the good performance of the algorithm in practice. More in line with this performance, we show that, with respect to a broad family of measures, the expected time complexity of the PV Algorithm is bounded by $O(d^7)$ for real, degree $d$, plane curves. We also exhibit a smoothed analysis of the PV Algorithm that yields similar complexity estimates. To obtain these results we combine robust probabilistic techniques coming from geometric functional analysis with condition numbers and the continuous amortization paradigm introduced by Burr, Krahmer and Yap. We hope this will motivate a fruitful exchange of ideas between the different approaches to numerical computation." @default.
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- W2912842130 date "2019-07-08" @default.
- W2912842130 modified "2023-10-01" @default.
- W2912842130 title "Plantinga-Vegter Algorithm takes Average Polynomial Time" @default.
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- W2912842130 doi "https://doi.org/10.1145/3326229.3326252" @default.
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