Weak nonmild solutions to some SPDEs

Details Weak nonmild solutions to some SPDEs Weak nonmild solutions to some SPDEs

2010-04-16

arxiv.org/abs/1004.2744v1

Mathematics

Probability

17 pages

Scientific paper

We study the nonlinear stochastic heat equation driven by space-time white noise in the case that the initial datum $u_0$ is a (possibly signed) measure. In this case, one cannot obtain a mild random-field solution in the usual sense. We prove instead that it is possible to establish the existence and uniqueness of a weak solution with values in a suitable function space. Our approach is based on a construction of a generalized definition of a stochastic convolution via Young-type inequalities.

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