Type: Article
Publication Date: 2016-07-01
Citations: 8
DOI: https://doi.org/10.3934/dcds.2016052
Consider the initial value problem forcubic derivative nonlinear Schrödinger equations in one space dimension.We provide a detailed lower bound estimate for the lifespanof the solution, which can be computed explicitly from the initial dataand the nonlinear term.This is an extension and a refinement of the previous work by one of theauthors [H. Sunagawa: Osaka J. Math. 43 (2006), 771--789],in which the gauge-invariant nonlinearity was treated.