本文讨论KdV型方程的演化不变集和精确解,并分别给出了KdV型方程在旋转群、伸缩群以及其它形式群上不变时满足的条件,导出了KdV型方程中系数函数的约束条件,通过求解约束条件构造KdV型方程的不变解.文中的结果进一步推广了Galaktionov关于非线性演化方程的结论.
Abstract: In this paper, we discuss evolutionary invariant sets and exact solutions to KdV-type equations. We derive conditions for the KdV-type equation to be invariant under the rotation group, the scaling group and other-type groups, respectively. We obtain the constraints for the coefficient functions in the KdV-type equation, furthermore, we construct the invariant solution to KdV-type equation by solving these constraints. These conclusions generalize the results of nonlinear evolutionary equations given by Galationov.