Auto-similaridade e unicidade para um sistema semilinear e existÃncia de soluÃÃo com dado singular para a equaÃÃo da onda semilinear

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

We obtain well-posedeness of small global solutions in Marcinkiewicz spaces L(p1,∞) x L(p2,∞) for semilinear systems. Mild solutions are obtained in this space with the right index to allow the existence of self-similar solutions. Using our estimates of the nonlinear coupling term, we prove the uniqueness of solutions in the class C([0,∞);Lp1(Rn)x Lp2(Rn)); without any smallness assumptions. We obtain some decay estimates and analyze the asymptotic behavior of the solutions. We also study the Cauchy problem for semilinear wave equations with singular initial date in Marcinkiewicz spaces , proving local well-posedeness results and a decay estimate next t = 0

ASSUNTO(S)

matematica asymptotic behavior semilinear system heat equation existÃncia e unicidade comportamento assintÃtico. espaÃos de lorentz semilinear wave equation sistema semilinear do calor equaÃÃo semilinear da onda existence and uniqueness lorentz spaces

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