摘要
In this paper, the squared eigenfunction symmetries for the BTL and CTL hierarchies are expficitly constructed with the suitable modification of the ones for the TL hierarchy, by considering the BTL and GTL constraints. Also the connections with the corresponding additional symmetries are investigated： the squared eigenfunction symmetry generated by the wave function can be viewed as the generating function for the additional symmetries.
基金
Supported by National Natural Science Foundation of China under Grant No. 11226196
the Fundamental Research Funds for the Central Universities under Grant No. 2012QNA45
