Concept explainers
Unnoticeable pruning. Suppose you have any infinite set. Is it always possible to remove some things from that set such that the collection of remaining things has the same cardinality as the original set? Explain why or why not, and illustrate your answer with an example.
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Chapter 3 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking, WileyPLUS NextGen Card with Loose-leaf Set Single Semester: An Invitation to Effective Thinking (Key Curriculum Press)
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