In this paper the existence of weak solutions, local and global in time solutions for small initial distribution of particles, for the three-dimensional Vlasov᎐ Poisson᎐Fokker᎐Planck system with measures as initial data is obtained. Also, the uniqueness and stability for these solutions is analysed.
On the initial value problem for the Vlasov-Poisson-Fokker-Planck system with initial data in Lp spaces
✍ Scribed by José A. Carrillo; Juan Soler
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 656 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0170-4214
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✦ Synopsis
Abstract
In this paper the global existence of weak solutions for the Vlasov‐Poisson‐Fokker‐Planck equations in three dimensions is proved with an L^1^ ∩ L^p^ initial data. Also, the global existence of weak solutions in four dimensions with small initial data is studied. A convergence of the solutions is obtained to those built by E. Horst and R. Hunze when the Fokker‐Planck term vanishes. In order to obtain the a priori necessary estimates a sequence of approximate problems is introduced. This sequence is obtained starting from a non‐linear regulation of the problem together with a linearization via a time retarded mollification of the non‐linear term. The a priori bounds are reached by means of the control of the kinetic energy in the approximate sequence of problems. Then, the proof is completed obtaining the equicontinuity properties which allow to pass to the limit.
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