Click the thumbnails to enlarge.
Example 1 (Figure 6.4.1)
Example 2 (Figures 6.4.2 and 6.4.3)
Propositions 2 and 5 (Figures 6.4.4 and 6.4.5)
Example 5 (Figure 6.4.6)
Example 6 (Figure 6.4.7)
Example 7 (Figures 6.4.8, 6.4.9 and 6.4.10)