Abstract
Aninteraction equations of the complex scalar nucleon field andreal scalar meson field is considered. we show that the Cauchy problem of the Klein-Gordon-Schrödinger system$ iu_{t}+u_{x x}=-uv, $$ v_{t t}-v_{x x}+v=|u|^2,$$u(0, x)= u_0(x), v(0, x)= v_0(x), v_t(0, x)= v_1(x)$ is locally well-posed for weak initial data $(u_0, v_0, v_1)\in H^s\times H^{s-1/2}\times H^{s-3/2}$ with $s\geq 0$. We use the analogous method for estimate the nonlinear couple terms developed by Bourgain and refined by Kenig, Ponce and Vega.
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