17. Geometric viewpoint on simultaneous equations, 1, accessible version 11.07
18. Geometric viewpoint on simultaneous equations, 2, accessible version 15.30
19. Subspaces, accessible version 16.47
20. Inverses, accessible version 14.13
21. Inverses: examples, accessible version 18.47
22. Elementary matrices, 1, accessible version 13.41
23. Elementary matrices, 2, accessible version 12.25
24. Determinants, accessible version 22.35
25. Properties of determinants, accessible version 18.55
26. Determinants: examples, accessible version 9.47
Sign of permutations, accessible version 13.23