# American Institute of Mathematical Sciences

March  2006, 5(1): 97-106. doi: 10.3934/cpaa.2006.5.97

## The uniform boundedness and threshold for the global existence of the radial solution to a drift-diffusion system

 1 Department of Applied Mathematics, Fukuoka University, Fukuoka, 814-0180, Japan 2 Graduate School of Mathematics, Hiroshima University, Hiroshima, 739-8526, Japan 3 Mathematical Institute, Tohoku University, Aoba, Sendai 980-8578

Received  September 2004 Revised  October 2005 Published  December 2005

In this paper, we discuss the global existence and uniform boundedness of the radial solutions to the drift-diffusion system in two space dimension, which is derived from the simulation of semiconductor device design and self-interacting particles. It is shown that the time global existence and the uniform boundedness of the solution to the problem below the sharp threshold condition.
Citation: Masaki Kurokiba, Toshitaka Nagai, T. Ogawa. The uniform boundedness and threshold for the global existence of the radial solution to a drift-diffusion system. Communications on Pure and Applied Analysis, 2006, 5 (1) : 97-106. doi: 10.3934/cpaa.2006.5.97
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