Abstract:
We introduce the concept of a generalized conditional symmetry. This concept provides an algorithm for constructing physically important exact solutions of non-integrable equations. Examples include 2-shock and 2-soliton solutions. The existence of such exact solutions for non-integrable equations can be traced back to the relation of these equations with integrable ones. In this sense these exact solutions are remnants of integrability.
Citation:
A. S. Fokas, Q. M. Liu, “Generalized conditional symmetries and exact solutions of non-integrable equations”, TMF, 99:2 (1994), 263–277; Theoret. and Math. Phys., 99:2 (1994), 571–582