完全可积O（3）－σ模型与r，s矩阵

Complete Integrable O(3)-σModel and r,s-Matrices

从约束体系的形式出发，讨论了Ｏ（３）－σ模型在任意局域坐标下的基本泊松结构，给出了相应的与场量有关的ｒ，ｓ矩阵，并且注意到，在一定的局域坐标下，ｒ，ｓ矩阵与场量无关．

The fundamental Poisson structure of nonlinear O(3)-σmodel,treated as a constrained dynamical system, is discussed in arbitary local coordinate frame.The corrsponding r,s-matrices,which are generally field dependent,are presented explicitly.It is noticed,however, that in a certain local coordinate frame,r,s-matrices will be field-independent.