On the global regularity of sub-critical Euler-Poisson equations with pressure

Details On the global regularity of sub-critical Euler-Poisson equations with pressure On the global regularity of sub-critical Euler-Poisson equations with pressure

2006-09-09

arxiv.org/abs/math/0609250v3

Mathematics

Analysis of PDEs

Scientific paper

We prove that the one-dimensional Euler-Poisson system driven by the Poisson forcing together with the usual γ-law pressure, γ ≥ 1, admits global solutions for a large class of initial data. Thus, the Poisson forcing regularizes the generic finite-time breakdown in the 2x2 p-system. Global regularity is shown to depend on whether or not the initial configuration of the Riemann invariants and density crosses an intrinsic critical threshold.

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