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arXiv 1312.0889math.PRmath.APmath.FA
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具有适应漂移的随机发展方程的一种新解法

A new approach to stochastic evolution equations with adapted drift

Matthijs Pronk, Mark Veraar

摘要:

在本文中,我们发展了一种新的方法,以适应的方式与时间和潜在的概率空间的无界漂移$A$的随机发展方程。随机漂移方程的半群方法会导致随机卷积项的自适应性问题。本文给出了随机卷积的一个新的表示公式,避免了非适应过程的积分。这里我们主要考虑抛物线的设置。我们建立与其他解决方案的概念,如弱解的连接。通常的抛物正则性的推导和我们表明,新的方法可以应用于研究半线性问题的随机漂移。文末用两个具有随机漂移的随机热方程的例子说明了所得结果。

英文摘要:

In this paper we develop a new approach to stochastic evolution equations with an unbounded drift $A$ which is dependent on time and the underlying probability space in an adapted way. It is well-known that the semigroup approach to equations with random drift leads to adaptedness problems for the stochastic convolution term. In this paper we give a new representation formula for the stochastic convolution which avoids integration of nonadapted processes. Here we mainly consider the parabolic setting. We establish connections with other solution concepts such as weak solutions. The usual parabolic regularity properties are derived and we show that the new approach can be applied in the study of semilinear problems with random drift. At the end of the paper the results are illustrated with two examples of stochastic heat equations with random drift.

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。

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