@Article{JPDE-3-17, author = {Li Yishen, Cheng Yi}, title = {Symmetries in (1+1)-dimensional Integrable System with Their Algebraic Structures and Conserved Quantities}, journal = {Journal of Partial Differential Equations}, year = {1990}, volume = {3}, number = {4}, pages = {17--30}, abstract = { In this paper we offer a general method or constructing symmetries and conserved quantities in the (1 + 1)-dimensional integrable system, prove the algebraic relations between symmetries, and what is more, give applications of this method in many integrable systems with physical significance.}, issn = {2079-732X}, doi = {https://doi.org/}, url = {http://global-sci.org/intro/article_detail/jpde/5811.html} }