PROBABILITY

文章目录 Orthogonal complements V ⊥ V^\perp V⊥ is a subspace. N ( A ) ( R ( A ) ) ⊥ N(A)(R(A))^\perp N(A)(R(A))⊥ N ( B T ) ( C ( B ) ) ⊥ N(B^T)(C(B))^\perp N(BT)(C(B))⊥ d i m ( V ) d i m ( V ⊥ ) n dim(V)dim(V^\perp)n dim(V)dim(V⊥)nRepresenting …

Problem Description Genghis Khan(成吉思汗)(1162-1227), also known by his birth name Temujin(铁木真) and temple name Taizu(元太祖), was the founder of the Mongol Empire and the greatest conqueror in Chinese history. After uniting many of the nomadic tribes …

链接：http://acm.hdu.edu.cn/showproblem.php?pid4126 题意：给定n个点的m条边，其中有q条边中的一条一定会变大（每一条变大的概率相同），求变大之后最小生成树边权和的期望。 分析：最小生成树树…

传送门 “在必须不要一条mst边的情况下，怎么快速组织新的mst?” （HDU 4081，HDU 4126） 无向图，保证每两点之间最多有一条直接相连的边（这题保证的东西还挺多的），然后Q次更新&…

typora-copy-images-to: Khan Academy 文章目录 typora-copy-images-to: Khan Academy@[toc] Khan AcademyChapter 2 —— VectorsVector BasisEquivalent VectorsComponents of vectorsMagnitude of VectorsScalar multiplicationAdding and subtracting vectorsGraphically A…

typora-copy-images-to: Khan Academy typora-copy-images-to: khan academy 文章目录 typora-copy-images-to: Khan Academytypora-copy-images-to: khan academyKhan AcademyPrecalculusChapter 1 —— TrigonometryIntroduction to the trigonometric angle addition identi…

HDU - 4126 Genghis Khan the Conqueror 树形dpMST 题目描述 Genghis Khan(成吉思汗)(1162-1227), also known by his birth name Temujin(铁木真) and temple name Taizu(元太祖), was the founder of the Mongol Empire and the greatest conqueror in Chinese history. Af…

可汗学院里，Computing板块的内容大致分为：计算机科学原理、信息理论（information theory）、互联网（Internet）、数据分析（analysis）、编程（programming）、算法…