Electronic Journal of Differential Equations,
Vol. 2000(2000), No. 68, pp. 1-12.

Title: Regularity of the interface for the porous medium equation

Author: Youngsang Ko (Kyonggi Univ., Suwon, Korea)
         
Abstract: 
We establish the interface equation and 
prove the C-infinity regularity of the interface for the 
porous medium equation whose solution is radial symmetry.

Submitted October 7, 2000. Published November 13, 2000.
Math Subject Classifications: 35K65.
Key Words: porous medium; radial symmetry; interface; C-infinity regularity.