ABSTRACT
Of concern are generalizations of the Korteweg-de Vries equation ∂ u ∂ t + ∂ 3 u ∂ x 3 + c u ∂ u ∂ x = 0. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429187810/28005645-324c-4d25-a9e4-00a49a74dffd/content/equ_chapter18_225_1.tif"/>
