Hessian matrix翻译成中文是黑塞矩阵或海森矩阵。这个在高等数学里没有提到，它有点类似于一元变量函数求其二阶导数判断极值问题。下面是转载过来的英文解释，讲的非常清楚了，和大家一起分享。https://www.quora.com/What-is-the-Hessian-matrix-What-is-it-used-for-and-for-what-reason
What is the Hessian matrix? What is it used for and for what reason?