Existence of solutions to degenerate parabolic problems with two weights   via the Hardy inequality
  The paper concentrates on the application of the following Hardy inequality \begin{equation*} \int_\Omega \ |\xi(x)|^p \omega_{1 }(x)dx\le \int_\Omega |\nabla \xi(x)|^p\omega_{2 }(x)dx, \end{equation*} to the proof of existence of weak solutions to degenerate parabolic problems of the type \begin{equation*} \left\{\begin{array}{ll}   u_t-div(\omega_2(x)|\nabla u|^{p-2} \nabla u )= \lambda W(x) |u|^{p-2}u& x\in\Omega,   u(x,0)=f(x)& x\in\Omega,   u(x,t)=0& x\in\partial\Omega,\ t>0,\\ \end{array}\right. \end{equation*} on an open subset $\Omega\subseteq\mathbb{R}^n$, not necessarily bounded, where \[W(x)\leq \min\{m,\omega_1(x)\},\qquad m\in\mathbb{R}_+.\] 
Iwona Skrzypczak and Anna Zatorska-Goldstein
math.AP