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