摘要
In this paper, the author considers equations with critical exponent in n ≥4 space tions on the initial data, it is proved that there small the initial data are. the Cauchy problem for semilinear wave dimensions. Under some positivity condican be no global solutions no matter how
基金
Project supported by the National Natural Science Foundation of China (No. 10225102)
the 973 Project of the Ministry of Science and Technology of China.
