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Proof without Words: (0, 1) and [0, 1] Have the Same Cardinality

by Kevin Hughes (Rowan University) and Todd K. Pelletier (Rowan University)

This article originally appeared in:
Mathematics Magazine
June, 2005

Subject classification(s): Logic and Foundations | Set Theory | Cardinality
Applicable Course(s): 4.11 Advanced Calc I, II, & Real Analysis

A 1-1 map is given of the half-open interval (0,1] onto the closed interval [0,1].

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