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libGDX is a cross-platform Java game development framework based on OpenGL (ES) that works on Windows, Linux, Mac OS X, Android, your WebGL enabled browser and iOS. Getting Started Setup your development environment (Eclipse, Intellij IDEA, NetBeans
2.3 Elimination Using Matrices – 用矩阵来消元
用矩阵来消元，我们需要用到消元矩阵，一种可以阐述消元步骤的方式
比如从ithi^{th}ith式减去jthj^{th}jth式的lijl_{ij}lij倍，这样的消元矩阵为EijE_{ij}Eij，所有这样的矩阵组合为E
相似的，可以把所有逆Eij−1E_{ij}^{-1}Eij−1组合为一个总的L=E−1\mathbf{L=E^{-1}}L=E−1
Matrices times Vectors and Ax
