本文研究了sine-Gordon方程的异宿轨在扰动下的保持性．利用无穷维Melnikov分析，证明了横截异宿轨的存在性，进而扰动系统有混沌发生．......

<正> The free energy in 1D sine-Gordon-Thirring model with impurity coupling is studied by means of functionalintegrals ......