The establishment of mathematical model of PDAG algorithm, with the application of a learning matrix to the error data, proved the stability and convergence of PDAG algorithm in theory.

将学习矩阵作用于误差数据建立PDAG算法的数学模型，从理论上证明了PDAG算法的稳定性和收敛性。

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In authentic education, silence is treated as a trustworthy matrix for the inner work students must do, a medium for learning of the deepest sort."

在真正的教育中，安静为学生进行内省提供可靠环境，是一种最深层次的学习媒介“

哈佛公开课 - 幸福课课程节选