2.2. Hierarchical Data and the Closure Property

2.2.3. Sequences as Conventional Interfaces

Exercises:

• 2.33.
• 2.34.
• 2.35.
• 2.36.
• 2.37.
• 2.38.
• 2.39.
• 2.40.
• 2.41.
• 2.42.
• 2.43.

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