Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN: 9781133382119
Author: Swokowski
Publisher: Cengage
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[画像:1.4-5 Theorem (Convergent sequence). Every convergent sequence in a metric space is a Cauchy sequence. that Proof. If xx, then for every &>0 there is an N = N(E) such d(x, x)< Hence by the triangle inequality we obtain for m, n>N d(xm, xn)≤d(xm, x)+d(x, xn)< E E +1=&. 22 This shows that (x,) is Cauchy. I for all n> N. We shall see that quite a number of basic results, for instance in the theory of linear operators, will depend on the completeness of the corresponding spaces. Completeness of the real line R is also the main reason why in calculus we use R rather than the rational line Q (the set of all rational numbers with the metric induced from R). Let us continue and finish this section with three theorems that are related to convergence and completeness and will be needed later. do by hand, without Al, I need detailed, graphs and codes also, make sure to answer using kresjig. Problem 1: Convergence in Function Spaces with Supremum Metric Problem Statement: Let C([0,1]) denote the space of continuous real-valued functions on the interval [0, 1] equipped with the supremum metric d∞ (f,g) = supe[0,1] |f(x) — 9(x)|. Consider the sequence of functions {n} defined by: fn(x)=" 1. a. Prove that {f} converges in C([0, 1]) with respect to the supremum metric. If it converges identify the limit function f. 2. b. Analyze the uniform convergence of {f} on [0,1]. Is the convergence uniform? Justify your answer using graphical intuition. 3. c. Now, consider the sequence {n} where: g(x) = Determine whether {gr.} converges in C([0, 1]) with respect to the supremum metric. Provide a proof and illustrate your reasoning with appropriate graphs.]
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Transcribed Image Text:1.4-5 Theorem (Convergent sequence). Every convergent sequence in a metric space is a Cauchy sequence. that Proof. If xx, then for every &>0 there is an N = N(E) such d(x, x)< Hence by the triangle inequality we obtain for m, n>N d(xm, xn)≤d(xm, x)+d(x, xn)< E E +1=&. 22 This shows that (x,) is Cauchy. I for all n> N. We shall see that quite a number of basic results, for instance in the theory of linear operators, will depend on the completeness of the corresponding spaces. Completeness of the real line R is also the main reason why in calculus we use R rather than the rational line Q (the set of all rational numbers with the metric induced from R). Let us continue and finish this section with three theorems that are related to convergence and completeness and will be needed later. do by hand, without Al, I need detailed, graphs and codes also, make sure to answer using kresjig. Problem 1: Convergence in Function Spaces with Supremum Metric Problem Statement: Let C([0,1]) denote the space of continuous real-valued functions on the interval [0, 1] equipped with the supremum metric d∞ (f,g) = supe[0,1] |f(x) — 9(x)|. Consider the sequence of functions {n} defined by: fn(x)=" 1. a. Prove that {f} converges in C([0, 1]) with respect to the supremum metric. If it converges identify the limit function f. 2. b. Analyze the uniform convergence of {f} on [0,1]. Is the convergence uniform? Justify your answer using graphical intuition. 3. c. Now, consider the sequence {n} where: g(x) = Determine whether {gr.} converges in C([0, 1]) with respect to the supremum metric. Provide a proof and illustrate your reasoning with appropriate graphs.
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