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A P Kast

Publications and source records attributed to A P Kast.

2 recordsLinked to original sources

Optimal prediction of stiff oscillatory mechanics.

We consider many-body problems in classical mechanics where a wide range of time scales limits what can be computed. We apply the method of optimal prediction to obtain equations that are easier to solve numerically. We demonstrate by examples that optimal prediction can reduce the amount of computation needed to obtain a solution by several orders of magnitude.

Journal Article↗

Optimal prediction of underresolved dynamics.

A method is presented for computing the average solution of problems that are too complicated for adequate resolution, but where information about the statistics of the solution is available. The method involves computing average derivatives by interpolation based on linear regression, and an updating of a measure constrained by the available crude information. Examples are given.

Journal Article↗