arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.1700math.CAmath-phmath.MP
收藏

Laplace逼近的高阶渐近性

Higher Asymptotics of Laplace's Approximation

William D. Kirwin

摘要:

我们提出的系数出现在渐近展开的多重积分的拉普拉斯型(其中的首项被称为拉普拉斯近似)的被积函数的渐近级数的表达式。我们最一般的结果假设被积函数没有光滑性,但我们得到的表达式包含在实践中可能难以评估的积分。然后,我们作出额外的假设,这是足以简化这些积分,在某些情况下,获得明确的公式系数的渐近展开。

英文摘要:

We present expressions for the coefficients which arise in asymptotic expansions of multiple integrals of Laplace type (the first term of which is known as Laplace's approximation) in terms of asymptotic series of the functions in the integrand. Our most general result assumes no smoothness of the functions of the integrand, but the expressions we obtain contain integrals which may be difficult to evaluate in practice. We then make additional assumptions which are sufficient to simplify these integrals, in some cases obtaining explicit formulae for the coefficients in the asymptotic expansions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑