【摘要】 <正> 其中 a₁>0,a₂（?）0和 a 均是常数,m 为正整数,l、h 为某个正常数.u₀（x）是[0,l]上给定的五次连续可微函数。方程（1）是人口增长和迁移问题中一类数学模型的推广形式。更多还原

【Abstract】 A initial bowndary—value problem of a forth—order parabolic different-ial equation is studied.We replace this initial boundary—value problem with a Volterra—type inlegral equation.The relation between the initial bound ary-value problem and the integral equation,the existence—uniqueness of a solu-tion to the integral equation are also given。更多还原