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2.1 - A Bijection between N and Z
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NOTE: Thanks to lula in the comments for pointing out that I had an algebra mistake:
At about 6:10 I wrote -(2x - 1) which should have been -(2x + 1)
At about 6:10 I wrote -(2x - 1) which should have been -(2x + 1)
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2.1 - A Bijection between N and Z
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