Calculus 101 - Cauchy Sequences in Real Numbers

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Cauchy Sequence Definition
Every Convergent Sequence is a Cauchy Sequence (with proof)
Every Cauch Sequence is bounded
Cauchy Sequence Convergence Criterion: A sequence of real numbers is convergent if and only if it is a Cauchy Sequence.
(mentioned Completeness of Real Numbers and the Bolzano-Weierstrass theorem)
book: Analysis With an Introduction to Proof, Steven R. Lay, Fifth Edition
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