Hc. Yin, The uniform existence of solutions for two-dimensional and three-dimensional semilinear wave equations with oscillatory data, P AM MATH S, 127(1), 1999, pp. 195-198
For two-dimensional and three-dimensional semilinear wave equations, I prov
e the uniform existence of solutions with oscillatory initial data. Hence I
solve an "open question" in one paper of J. L. Joly, G. Metivier and J. Ra
nch.