2013年7月4日
uva 12167 - Proving Equivalences(强连通缩点，4级)
摘要： Consider the following exercise, found in a generic linear algebra textbook.LetAbe ann×nmatrix. Prove that the following statements are equivalent:Ais invertible.Ax = bhas exactly one solution for everyn× 1 matrixb.Ax = bis consistent for everyn× 1 matrixb.Ax = 0has only the trivial s 阅读全文
posted @ 2013-07-04 21:46 剑不飞 阅读(215) 评论(0) 推荐(0)