 Lecture 3. Fundamental groups and knot groups by S. Kim and V. O. Manturov

Primary text: ymsc.tsinghua.edu.cn/__local/7/15/F3/1E411B916C9D723E37FB7758B37_1452B110_655FB.pdf

Slides 12–21, especially slide 21 Dehn region/crossing figure. Author names retained as verified initials; no guessed expansion of S. Kim.