LA Undergraduate course, Nanjing University, 2025 线性代数课件 Chapter 1 chapter-1-talk.pdf Chapter 2 chapter-2-talk.pdf Chapter 3 chapter-3-talk.pdf Chapter 4 chapter-4-talk.pdf Chapter 5 chapter-5-talk.pdf Chapter 6 chapter-6-talk.pdf Bluesky Facebook LinkedIn X (formerly Twitter)