Email this article Logarithmic character of large time asymptotics for solutions of Sobolev type nonlinear equations with cubic nonlinearity
- Authors: Naumkin P.I.1
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Affiliations:
- National Autonomous University of Mexico, Center of Mathematical Sciences
- Issue: Vol 214, No 7 (2023)
- Pages: 134-160
- Section: Articles
- URL: https://journals.rcsi.science/0368-8666/article/view/133543
- DOI: https://doi.org/10.4213/sm9515
- ID: 133543
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Abstract
The Cauchy problem of the form
{i∂t(u−∂2xu)+∂2xu−a∂4xu=u3,t>0, x∈R,u(0,x)=u0(x),x∈R,
is considered for a Sobolev-type nonlinear equation with cubic nonlinearity, where a>1/5, a≠1. It is shown that the asymptotic behaviour of the solution is characterized by an additional logarithmic decay in comparison with the corresponding linear case. To find the asymptotics of solutions of the Cauchy problem for a nonlinear Sobolev-type equation, factorization technique is developed. To obtain estimates for derivatives of the defect operators, L2-estimates of pseudodifferential operators are used.
About the authors
Pavel Ivanovich Naumkin
National Autonomous University of Mexico, Center of Mathematical Sciences
Author for correspondence.
Email: pavelni@matmor.unam.mx
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