Acta mathematica scientia,Series B ›› 2019, Vol. 39 ›› Issue (3): 669-690.doi: 10.1007/s10473-019-0304-5

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ON THE NECESSARY AND SUFFICIENT CONDITIONS TO SOLVE A HEAT EQUATION WITH GENERAL ADDITIVE GAUSSIAN NOISE

Yaozhong HU1, Yanghui LIU2, Samy TINDEL2   

  1. 1. Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, T6G 2G1, Canada;
    2. Department of Mathematics, Purdue University, West Lafayette, IN 47907, USA
  • Received:2018-03-22 Revised:2018-12-04 Online:2019-06-25 Published:2019-06-27
  • Supported by:
    Y. Hu is supported by an NSERC grant and a startup fund of University of Alberta; S. Tindel is supported by the NSF grant DMS1613163.

Abstract: In this note, we consider stochastic heat equation with general additive Gaussian noise. Our aim is to derive some necessary and sufficient conditions on the Gaussian noise in order to solve the corresponding heat equation. We investigate this problem invoking two different methods, respectively, based on variance computations and on path-wise considerations in Besov spaces. We are going to see that, as anticipated, both approaches lead to the same necessary and sufficient condition on the noise. In addition, the path-wise approach brings out regularity results for the solution.

Key words: Stochastic heat equation, general Gaussian noise, L2 solution, sufficient and necessary condition, Wong-Zakai approximation, pathwise solution, Hölder continuity, Besov space

CLC Number: 

  • 60G15
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