摘要：
Gauss-Jordan :"solve two equations at once"steps: 1.write down the identify matrix(单位矩阵) on the right side of matix A to get the augmented matrix(增广矩阵).2.eliminant the augmented matrix to be a matrix which consists an identify matrix and A inverse.Eliminant procedure is like pivot eliminan 阅读全文
摘要：
Recently,in order to getready for postgraduate stage study ,my tutor give me a MIT website to review linear algebra ,I record important information. Today,I learned L3 which is about inverse matrix. The professor give evidence that which matrixes are singular: first,determinant equals to zero.Becaus 阅读全文