Special equations Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4569 Description Let f(x) = a nx n +...+ a 1x +a 0, in which a i (0 <= i <= n) are all known integers. We call f(x) 0 (mod…

“矩阵代数初步”(Introduction to MATRIX ALGEBRA)课程由Prof. A.K.Kaw(University of South Florida)设计并讲授. PDF格式学习笔记下载(Academia.edu) 第5章课程讲义下载(PDF) Summary Consistent and inconsistent system A system of equations $$[A][X]=[B]$$ where $[A]$ is called the coefficient…

1.Introduction 2.First-order Differential Equations Exercise2.1. Find solutons of the following intial-value problems in $\bbR^2$: (1)$2u_y-u_x+xu=0$ with $u(x,0)=2xe^{x^2/2}$; (2)$u_y+(1+x^2)u_x-u=0$ with $u(x,0)=\arctan x$. Solution: (1)Since $(-1,…

Introduce The article shows a way to use math equations to represent code's logical. Key ideas logical first Get readers to see the logical first, so prefer to keep a 'where' section to describe variables separately. Pure function conception I am thi…

All the two important problems that the EM theory trys to describe and explain are propogation and radiation of EM wave, on the basic of Maxwell Equations. So we have to talk about the Maxwell Equations firstly  ,the greatest achievement in my opinio…

FITTING A MODEL VIA CLOSED-FORM EQUATIONS VS. GRADIENT DESCENT VS STOCHASTIC GRADIENT DESCENT VS MINI-BATCH LEARNING. WHAT IS THE DIFFERENCE? In order to explain the differences between alternative approaches to estimating the parameters of a model,…

Description Consider equations having the following form: a*x1^2+b*x2^2+c*x3^2+d*x4^2=0 a, b, c, d are integers from the interval [-50,50] and any of them cannot be 0. It is consider a solution a system ( x1,x2,x3,x4 ) that verifies the equation, xi…

ACCEPT acm作业 http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=204 因为老师是在集合那里要我们做这道题.所以我很是天真的就以为要用集合做,结果发现网上都是用数组简单明了地实现了,显得我的代码,特么地超级恶心!!!!!!! 在这里存档一下,别人就不要看了,ZOJ的格式也真是恶心...居然因为这个也弄了好久,应该只有我一个人用这么 没脑的集合方式做吧..真的是哭瞎在厕所里!!! //#include "stdafx.…

Fragalà, Ilaria; Gazzola, Filippo; Kawohl, Bernd. Existence and nonexistence results for anisotropic quasilinear elliptic equations. Ann. Inst. H. Poincaré Anal. Non Linéaire 21 (2004), no. 5, 715--734. http://www.sciencedirect.com/science/article/pi…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1496 Equations Description Consider equations having the following form: a*x1^2+b*x2^2+c*x3^2+d*x4^2=0a, b, c, d are integers from the interval [-50,50] and any of them cannot be 0. It is consider a solu…