Getting started
https://eigen.tuxfamily.org/dox/GettingStarted.html
long tutorial
https://eigen.tuxfamily.org/dox/group__TutorialMatrixClass.html
Quick reference guide
https://eigen.tuxfamily.org/dox/group__QuickRefPage.html
原文：https://www.cnblogs.com/lion-zheng/p/10357923.html