@Article{JPDE-4-19,
author = {Lu Guofu},
title = {Some Properties of Free Boundary for Solution of Porous Medium Equation with Gravity Term in One-dimension},
journal = {Journal of Partial Differential Equations},
year = {1991},
volume = {4},
number = {2},
pages = {19--35},
abstract = { Consider the degenerate parabolic equation (porous medium equation with gravity term): u_t = (u^m)_{xx} + (u^n)_x, -&#8734 < x < &#8734, t > 0, m > 1 u(x, 0) = u_0(x), -&#8734 < x < &#8734 The main results consist of the estimation of t^&#8727_i called waiting time, the behavior of pressure V = \frac{m}{m-1}u^{m-1} near a vertical or a nonvertical part of &#962_i(t) and a condition of that &#962_i(t) is continuously differentiable.},
issn = {2079-732X},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/jpde/5765.html}
}