摘要： In this paper,we study how much regularity of initial data is needed to ensure existence of a local solution to the following semilinear wave equations …. We proved that the range of s is ,respectively,with if n=2, and δ>0 if n=3, and δ≥0 if n≥4. Which is consistent with Lindblad's counterexamples [3] for n=3, and the main ingredient is the use of the Strichartz estimates and the refinement of these.
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