研究了半线性抛物方程的初边值问题.证明了它对应的稳态问题的任意正解是该抛物问题整体解存在与否的初值门槛(结论的精确表述见本文定理1).
The initial boundary value problem of semilinear parabolic equations is studied. It is proved that any positive solution of its steady-state problem is an initial datum threshold for the existence and nonexistence of global solution to the associated parabolic problem ( see Theorem 1 for the precise statement).