Abstract
This paper studies the KdV–Caudrey–Dodd–Gibbon equation. The modified
F
-expansion method, exp-function method as well as the
G
′/
G
method are used to extract a few exact solutions to this equation. Later, the ansatz method is used to obtain the topological 1-soliton solution to this equation. The constraint conditions are also obtained that must remain valid for the existence of these solutions.