2017/10/01 by Olena Vaneeva, Severin Pošta · 1 citation
Physics and Astronomy · Mathematics · #Nonlinear Waves and Solitons #Homotopy and Cohomology in Algebraic Topology #Algebraic and Geometric Analysis
paper · doi:10.1063/1.5004973
We classify the admissible transformations in a class of variable coefficient Korteweg–de Vries equations. As a result, a full description of the structure of the equivalence groupoid of the class is given. The class under study is partitioned into six disjoint normalized subclasses. The widest possible equivalence group for each subclass is found which appears to be generalized extended in five cases. Ways for improvement of transformational properties of the subclasses are proposed using gaugings of arbitrary elements and mapping between classes. The group classification of one of the subclasses is carried out as an illustrative example.