This paper gives an effective algorithm for deciding of irreducibility and aperiodicity of nonnegative matrices.

本文为非负方阵不可约性和非周期性的判定给出了实现算法。

Build the aperiodicity communication institution. In 2006, they organized 6 training and communication a activities.

建立不定期交流制度。2006年开展培训与交流活动6次。