設 $q$ 是一個非負實數, $ au $ 是一個正數, $ riangle $ 是 $n$ 維的 Laplacian operator, $Omega $ 是一個在 $mathbb{R}^n$ 的有界區域, 當中 $Omega $ 是 $n$ 維的球或正方形. 本文探討下列拋物型方程解的存在性, [ egin{array}{c} |x|^{q}u_{t}(t,x)-K(Delta u(t,x))=f(u(t- au,x)) mbox{ for } t>0, xin Omega, \ u(t,x)=eta(t,x) mbox{ for } - au leq t leq 0, xin Omega, \ u(t,x)=0 mbox{ in } partial Omega, \ end{array} ] 其中 $eta (t,x)$ 是一個在 $[- au,0] imes Omega$ 中的非負 H"{o}lder 連續函數, $K$ 是正的擴散係數, $f(u)$ 是一個在正數 $c^{*}$ 時有奇異點的反應項. 本研究給出解的存在與不存在的條件.
Let $q$ be a nonnegative real number, $ au $ be a positive number, $ riangle $ be the $n$ dimensional Laplacian operator, $Omega $ be bounded in $mathbb{R}^n$ with $Omega $ is either an $n$-dimensional ball or a square. This paper studies the existence and non-existence of the solution $u(t,x)$ of the parabolic problem: [ egin{array}{c} |x|^{q}u_{t}(t,x)-K(Delta u(t,x))=f(u(t- au,x)) mbox{ for } t>0, xin Omega, \ u(t,x)=eta(t,x) mbox{ for } - au leq t leq 0, xin Omega, \ u(t,x)=0 mbox{ on } partial Omega, \ end{array} ] where $eta (t,x)$ is a nonnegative H"{o}lder continuous function in $[- au,0] imes Omega$, $K$ is a positive constant representing the diffusion coefficient, and $f(u)$ is a reaction function which is singular at some point $c^{*}>0$. The criteria for the existence and non-existence of the solution is given.