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Results tagged with elementary-set-theory
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user 566725
For elementary questions on set theory. Topics include intersections and unions, differences and complements, De Morgan's laws, Venn diagrams, relations and countability.
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Can $\pi$ be defined using Dedekind cuts?
There are many ways to do this, but my preference is to use Euler's solution to the Basel problem (https://en.wikipedia.org/wiki/Basel_problem). Here's how I would define the lower set of the Dedekin …
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