http://mathworld.wolfram.com/CongruentMatrices.html Two square matrices  and  are called congruent if there exists a nonsingular matrix  such that where  is the transpose. Congruent Exactly equal in size and shape. Congruent sides or segments have th…

转载http://www.cnblogs.com/xpvincent/archive/2013/01/25/2877411.html 做三次样条曲线时,需要解三对角矩阵(Tridiagonal Matrices).常用解法为Thomas Algorithm,又叫The tridiagonal matrix algorithm (TDMA).它是一种基于高斯消元法的算法, 分为两个阶段:向前消元forward elimination和回代backward substitution.本文以一个6乘6…

题目描述: This time, you are supposed to find A+B where A and B are two matrices, and then count the number of zero rows and columns. 输入: The input consists of several test cases, each starts with a pair of positive integers M and N (≤10) which are the n…

Matrices and Vectors Matrices are 2-dimensional arrays: A vector is a matrix with one column and many rows:The above matrix has four rows and three columns, so it is a 4 x 3 matrix. Notation and terms:So vectors are a subset of matrices. The above ve…

目录 引 主要结果 定理2,3 定理4 直观解释 Recovering Low-Rank Matrices From Few Coefficients In Any Basis-David Gross 引 依旧是一个重构矩阵的问题,这篇论文的符号有些奇怪,注意一下.假设有一个矩阵\(\rho \in \mathbb{R}^{n \times n}\),其秩为\(r \ll n\).有一组基\(w_a, a=1,\ldots, n^2\),是已知的.假设我们观测到的是,一组内积\(\{ (\rho,…

目录 Nystorm method 低秩逼近 矩阵乘法的逼近 Belabbas M A, Wolfe P J. Fast Low-Rank Approximation for Covariance Matrices[C]. IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, 2007: 293-296. Nystorm method 和在WIKI看到的不是同一个东西?…

目录 问题 算法 LINEARTIMESVD 算法 CONSTANTTIMESVD 算法 理论 算法1的理论 算法2 的理论 代码 Drineas P, Kannan R, Mahoney M W, et al. Fast Monte Carlo Algorithms for Matrices II: Computing a Low-Rank Approximation to a Matrix[J]. SIAM Journal on Computing, 2006, 36(1): 158-183…

C. Nastya Is Transposing Matrices time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Nastya came to her informatics lesson, and her teacher who is, by the way, a little bit famous here gave he…

题目1001:A+B for Matrices 时间限制:1 秒内存限制:32 兆 题目描述: This time, you are supposed to find A+B where A and B are two matrices, and then count the number of zero rows and columns. 输入: The input consists of several test cases, each starts with a pair of posit…

题目1001:A+B for Matrices 时间限制:1 秒 内存限制:32 兆 特殊判题:否 提交:15235 解决:6172 题目描述: This time, you are supposed to find A+B where A and B are two matrices, and then count the number of zero rows and columns. 输入: The input consists of several test cases, each st…