Multigrid interpretations of the parareal algorithm leading to an overlapping variant and MGRIT
Multigrid interpretations of the parareal algorithm leading to an overlapping variant and MGRIT
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平行现实算法的多重网格解释导致重叠变体和 MGRIT
DOI:
10.1007/s00791-018-0297-y
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发表时间:
2018-06
影响因子:
--
通讯作者:
Zhang H
中科院分区:
文献类型:
--
作者:
G;er M J;Kwok F;Zhang H
The parareal algorithm is by construction a two level method, and there are several ways to interpret the parareal algorithm to obtain multilevel versions. We first review the three main interpretations of the parareal algorithm as a two-level method, a direct one, one based on geometric multigrid and one based on algebraic multigrid. The algebraic multigrid interpretation leads to the MGRIT algorithm, when using instead of only anF-smoother, a so called-smoother. We show that this can be interpreted at the level of the parareal algorithm as generous overlap in time. This allows us to generalize the method to even larger overlap, corresponding in MGRIT to-smoothing,, and we prove two new convergence results for such algorithms in the fully non-linear setting: convergence in a finite number of steps, becoming smaller whenincreases, and a general superlinear convergence estimate for this generalized version of MGRIT. We illustrate our results with numerical experiments, both for linear and non-linear systems of ordinary and partial differential equations. Our results show that overlap only sometimes leads to faster algorithms.
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DOI:
10.1007/978-3-319-05789-7_58
发表时间:
2014
期刊:
--
影响因子:
--
作者:
M. Gander;L. Halpern;Kévin Santugini Repiquet
通讯作者:
M. Gander;L. Halpern;Kévin Santugini Repiquet
DOI:
10.1007/978-3-319-05789-7_24
发表时间:
2014
期刊:
--
影响因子:
--
作者:
M. Gander;L. Halpern;Kévin Santugini Repiquet
通讯作者:
M. Gander;L. Halpern;Kévin Santugini Repiquet
DOI:
10.1016/s0764-4442(00)01793-6
发表时间:
2001-04-01
期刊:
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE
影响因子:
--
作者:
Lions, JL;Maday, Y;Turinici, G
通讯作者:
Turinici, G
DOI:
10.1016/j.cam.2013.01.011
发表时间:
2014-03
期刊:
J. Comput. Appl. Math.
影响因子:
--
作者:
M. Gander;E. Hairer
通讯作者:
M. Gander;E. Hairer
DOI:
10.1007/978-3-540-75199-1_4
发表时间:
2008
期刊:
--
影响因子:
--
作者:
M. Gander;E. Hairer
通讯作者:
M. Gander;E. Hairer