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Cauchy sequence - Wikipedia, the free encyclopedia
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Thus, by considering Cauchy sequences instead of convergent sequences we do not need to refer to the unknown limit of a sequence, and in effect both concepts are the same.
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Cauchy sequence proof , help Calculus & Beyond ... = abs[a_n - A ] + abs[ a_m - A ] < e/2 + e/2 = e thus {a_n} is cauchy; 3. The attempt at a solution; the part where i have trouble understanding this proof is , where does the e/2 comes from? ... Cauchy sequence proof , help Share It Thread Tools Search this Thread...
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In the main text we discussed how a Cauchy sequence of real numbers is really a Cauchy sequence of Cauchy sequences. And each of those sequences is a sequence of rational numbers. Here we will give rigorous proof that a Cauchy sequence of real numbers does indeed converge to a real number.
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KEYWORDS: Proofs, Triangle inequality, Epsilon Proofs, Cauchy sequences, Denseness of rationals, Alternating series; SOURCE: Stuart Price, University of Warwick; TECHNOLOGY: PDF, Flash ... KEYWORDS: Cardinality, Induction, Sequences, Series, Topology, Continuity, Differentiability, History, Dirichlet Function,
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What's New on the Math Archives ... KEYWORDS: Proofs, Triangle inequality, Epsilon Proofs, Cauchy sequences, Denseness of rationals, Alternating series; SOURCE: Stuart Price, University of Warwick; TECHNOLOGY: Postscript...
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Following Georg Cantor (1845-1918) one usually defines real numbers, as equivalence classes of rational Cauchy sequences. Two sequences U and V are considered equivalent if the limit of U(n)-V(n) is zero.
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