An alternative explicit construction of N-soliton solutions in 1+1 dimensions

Abstract
Using the special Riemann‐problem technique of Zakharov e t a l. [Sov. Phys. JETP 4 7, 1017 (1978)], an explicit N‐step Bäcklund transformation is derived for a class of 1+1‐dimensional nonlinear evolution equations, thus providing an alternative explicit expression of their N‐soliton solutions which no longer involves computations of the intermediate solutions, nor leaves any expansion of N×N determinants (and their differentiation) to be done.