应用压缩映射原理和延拓定理,在分数次Sobolev空间中,证明一类四阶非线性波动方程的初值问题,存在唯一的整体广义解和整体古典解.还给出该初值问题解爆破的充分条件.
The existence and the uniqueness of the global generalized solution and the global classical solution to the initial value problem for a class of nonlinear wave equation of fourth order are studied in the fractional order Sobolev space by the contraction mapping principle and the extension theorem. The sufficient conditions for blow up of the solution to the above initial value problem are given.