首页> 外文会议>International Conference on Algebraic Biology(AB 2007); 20070702-04; Castle of Hagenberg(AT) >Reduction of Algebraic Parametric Systems by Rectification of Their Affine Expanded Lie Symmetries
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Reduction of Algebraic Parametric Systems by Rectification of Their Affine Expanded Lie Symmetries

机译:通过校正仿射扩展的Lie对称性来减少代数参数系统

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摘要

Lie group theory states that knowledge of a m-parameters solvable group of symmetries of a system of ordinary differential equations allows to reduce by m the number of equations. We apply this principle by finding some affine derivations that induces expanded Lie point symmetries of considered system. By rewriting original problem in an invariant coordinates set for these symmetries, we reduce the number of involved parameters. We present an algorithm based on this standpoint whose arithmetic complexity is quasi-polynomial in input's size.
机译:李群理论指出,常微分方程组的m个参数的对称对称性组的知识允许将方程数减少m。我们通过找到一些仿射导数来应用该原理,这些仿射导数会引起所考虑系统的扩展李点对称性。通过在这些对称性的不变坐标集中重写原始问题,我们减少了所涉及参数的数量。我们基于此观点提出了一种算法,其算术复杂度是输入大小的拟多项式。

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