Before Everything Before Everything 前言 By JaneZ,2025.1.21,M Stand Coffee,Nanjing Well, hello world ! This is the owner of this blog! My name is JaneZ , a student from Shanghai Jiaotong University.I major in Computer Sc 2025-01-21 #JaneZ's Wonderland
JaneZ's PPCA JaneZ’s PPCA 开一个楼 ,用于记录PPCA每天的多线程,消解没有暑假的哀愁😢 6-23 Day 0 选了DHT(Distributed Hash Table),也是很早之前就计划好的,虽然早上差一点被Raft动摇了,但还是决定写一个比较top-level的东西 PPCA的好处就是可以戴耳机写代码,0人管你,爽听6小时歌😆 又爱上我霉了🥰 吉他调音成功! 主要的进展是学习了Go基 2025-06-23 PPCA #JaneZ's Wonderland #PPCA #DHT
Mathematical Logic Cheating Paper ML CT Paper 前言 这是留给25级往后ACM班学弟学妹的一份遗产了,很详细地总结了CS2950 Mathematical Logic这门课程涉及的主要知识点(有所删减)。特别值得注意的是,我在25.6.5晚在前三位作者整理的基础上,增添了6个example,是拟合了近3年ML Final的结果。今晚考完,更觉得整理地挺到位(精准吧 这是能说的嘛🤣)。分数还没出,也不知道实际到底考的怎样 2025-04-19 Mathematical Logic #Mathematical Logic
State Spaces & Uninformed Search CS-188 Lecture 2 State Spaces and Search Problems Given our agent’s current state,how can we arrive at a new state that satisfies its goals in the best possible way? Elements of a search problem: A s 2025-06-11 CS188_Introduction to AI #Artificial Intelligence
Graph Algorithm Graph Algorithms ps: 上机课是05.18上的,算法是05.23学的🤣(评价是这周事还是太多了)perhaps和这节上机课量巨大也有关系吧😢 术语回顾 DAG 有向无环图 点度 = 入度 + 出度 SPT 最短路径树 最短路 单源/多源 Q:给出一个加权图和图上的一个节点s,找出s到图中每一节点的最短路径 Dijkstra 算法 Core: v=argmin_u∈SPT, 2025-05-23 Algorithms #Algorithm #Dijkstra #Bellman Ford #Floyd #SPFA #SLF #Tarjan #Kosaraju
Theories and Decidability Theories and Decidability Recall The 4 Questions we’re gonna answer. Q1: What is a mathematical proof? Q2: What makes a proof correct? Q3: Is there a boundary of provability? Q4: Can computers find 2025-05-18 Mathematical Logic #Mathematical Logic
Proof of the Undecidabilty of FO Mathematical Logic 11 Proof of the undecidability of FO Undecidability of FO Basic Thoughts of the Proof We’ve already proved that Π halt is not R-decidable by using Π’halt ⩽m Π halt. So we only need 2025-05-17 Mathematical Logic #Mathematical Logic
LCA DS MST LCA ———— Least Common Ancestors 如何计算? 深度相同一起跳 深度不同,深度大的跳 显然,一层一层跳复杂度将会来到O(N) 空间换时间 一次多跨几步 联系:ST表 考虑保存2 的幂次级 祖先 于是我们有了一种很棒的倍增做法: 假设 y 比 x 深,则 y 需要向上跳 a = h(y) - h(x) 对 a 进行二进制拆分 令 f[x][i]为结点 x 的 2025-05-11 Algorithms #Data Structure #Algorithm #LCA #Disjoint Set #MST #Kruskal #Prim
Mathematical Logic 10 Halting Problem Mathematical Logic 10 Halting Problem R-computable Let F: A* -> B* (A,B are 2 alphabets) (1)A program P computes F if for all w ∈\in∈ A*, P: w->F(w) (2)F is R-computable if there is a program w 2025-05-11 Mathematical Logic #Mathematical Logic
MIT 6.006 Shortest Path Algorithm MIT 6.006 4 Shortest Path Algorithm Overview Weighted Graph General Approaches Negative Edges Optimal Substructure Mainly 2 Algorithms: Dijkstra with O(V + E) for non-negative edge weights Bellman F 2025-05-09 Algorithms #Algorithm #Dijkstra #Shortest Path #Bellman Ford