等谱和非等谱TD族，Lax表示与零曲率表示

ISOSPECTRAL AND NON-ISOSPECTRAL TD HIERARCHIES, THE LAX REPRESENTATIONS AND THE ZERO-CURVATURE REPRESENTATIONS

首先，推广文［１］的结果，建立了等谱（λｔ＝０）和非等谱（λ＝λｎ＋１）ＴＤ族，并给出相应的Ｌａｘ表示，再用文［２］的方法得到了相应的零曲率表示。

By generalizing the results given in reference [1], the isospectral(λt=0) and the nonisospectral (λt=λn+1) TD hierarchies are constructed and their corresponding Lax representations are also presented. In addition, their corresponding zero-curvature representations are obtained by use of the method which is given in reference [2].