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3. For each of the following, give, if possible, an example. Justify your answers. (a) An...
2. (10 Points) Give the following examples (the roofs are not required). (a) A bounded sequence in LP[o 0, 1],1 S p S oo, that has no strongly convergent subsequence (b) A bounded sequence in L&#...
2. (10 Points) Give the following examples (the roofs are not required). (a) A bounded sequence in LP[o 0, 1],1 S p S oo, that has no strongly convergent subsequence (b) A bounded sequence in L'(0, 1] that has no weakly convergent subsequence. (c) A weakly convergent sequence in L [0,1] that has no strongly convergent subsequence.
2. (10 Points) Give the following examples (the roofs are not required). (a) A bounded sequence in LP[o 0, 1],1 S p S...
6. Give an example of a non-constant sequence that satisfies the given conditions or explain why...
6. Give an example of a non-constant sequence that satisfies the given conditions or explain why such a sequence does not exist: (1) {an} is bounded above but not convergent. (2) {an} is neither decreasing nor increasing but still converges. (3) {an} is bounded but divergent. (4) {an} is unbounded but convergent. (5) {an} is increasing and converges to 2.
Exercise 5 (based on Tao). Let (X,d) be an arbitrary metric space. Prove the following statements...
Exercise 5 (based on Tao). Let (X,d) be an arbitrary metric space. Prove the following statements (1) If a sequence is convergent in X, all its subsequences are converging to the same limit as the original sequence. (2) If a subsequence of a Cauchy sequence is convergent, then the whole sequence is convergent to the same limit as the subsequence. (3) Suppose that (X,d) is complete and Y S X is closed in (X,d). Then the space (Y,dlyxy) is complete....
Please answer all parts. (2) (a) Give an example of sequences (sn) and (tn) such that...
Please answer all parts.
(2) (a) Give an example of sequences (sn) and (tn) such that lim sn ntoo 0, but the sequence (sntn) does not converge does not converge.) (b) Let (sn) and (tn) be sequences such that lim sn (Prove that it O and (tn пH00 is a bounded sequence. Show that (sntn) must converge to 0. 1 increasing subsequence of it (b) Find a decreasing subsequence of it (3) Consider the sequence an COS (а) Find an...
4. Answer the following questions. Justify your answers. a. Is the Ratio Test always conclusive? If...
4. Answer the following questions. Justify your answers. a. Is the Ratio Test always conclusive? If not, give an example of a series for which the Ratio Test is inconclusive. b. Determine if the series En=1 an is convergent or divergent.
B2. (a) Let I denote the interval 0,1 and let C denote the space of continuous functions I-R. Def...
B2. (a) Let I denote the interval 0,1 and let C denote the space of continuous functions I-R. Define dsup(f,g)-sup |f(t)-g(t) and di(f.g)f (t)- g(t)ldt (f,g E C) tEI (i) Prove that dsup is a metric on C (ii) Prove that di is a metric on C. (You may use any standard properties of continuous functions and integrals, provided you make your reasoning clear.) 6 i) Let 1 denote the constant function on I with value 1. Give an explicit...
The questions for the calculusIII Instructions. Answer each question completely: justify your answers. This assignment is...
The
questions for the calculusIII
Instructions. Answer each question completely: justify your answers. This assignment is due at 5pm on Wednesday September 25 in Assignment Box #20. 1. Determine if the series given below are convergent. If convergent, calculate the sum of the series. If divergent, justify your answer. 1+23 2 32n n=1 (b) Žlcos(1) (1) § (12 + 3n+3) Suggestion: Use partial fractions. 2. Express this number as a ratio of integers: 2.46 = 2.46464646.. 3. The Fibonacci sequence...
7. Decide whether or not the following situations are possible and justify your answers. (a) (1...
7. Decide whether or not the following situations are possible and justify your answers. (a) (1 point) f: R² + RP is onto. (b) (1 point) f : R² + R is 1-1. (c) (1 point) The set s-{69 69 66 2.69 1 1 is a basis of M3x2(R)? (d) (1 point) The set S= 1 0) (0 ) ( ) ( ) ( ) (0 )} is linearly independent. (e) (1 point) For a linear transformation A : RM...
1. Answer the following questions. Justify your answers. (a) (3 marks) For what values of x...
1. Answer the following questions. Justify your answers. (a) (3
marks) For what values of x does the series 1 + 22x 2 + 24x 4 + 26x
6 · · · + 22nx 2n + · · · converge? (b) (9 marks) Is the following
series absolutely convergent, conditionally convergent or
divergent? i. X∞ n=1 2 √ n − 2 √ n + 1 ii. X∞ n=1 arctan(n) n2 + 1
iii. X∞ k=1 (−1)k k
1. Answer the...
R i 11. Prove the statement by justifying the following steps. Theorem: Suppose f: D continuous...
R i 11. Prove the statement by justifying the following steps. Theorem: Suppose f: D continuous on a compact set D. Then f is uniformly continuous on D. (a) Suppose that f is not uniformly continuous on D. Then there exists an for every n EN there exists xn and > 0 such that yn in D with la ,-ynl < 1/n and If(xn)-f(yn)12 E. (b) Apply 4.4.7, every bounded sequence has a convergent subsequence, to obtain a convergent subsequence...
2. (10 Points) Give the following examples (the roofs are not required). (a) A bounded sequence in LP[o 0, 1],1 S p S oo, that has no strongly convergent subsequence (b) A bounded sequence in L'(0, 1] that has no weakly convergent subsequence. (c) A weakly convergent sequence in L [0,1] that has no strongly convergent subsequence.
2. (10 Points) Give the following examples (the roofs are not required). (a) A bounded sequence in LP[o 0, 1],1 S p S...
6. Give an example of a non-constant sequence that satisfies the given conditions or explain why such a sequence does not exist: (1) {an} is bounded above but not convergent. (2) {an} is neither decreasing nor increasing but still converges. (3) {an} is bounded but divergent. (4) {an} is unbounded but convergent. (5) {an} is increasing and converges to 2.
Exercise 5 (based on Tao). Let (X,d) be an arbitrary metric space. Prove the following statements (1) If a sequence is convergent in X, all its subsequences are converging to the same limit as the original sequence. (2) If a subsequence of a Cauchy sequence is convergent, then the whole sequence is convergent to the same limit as the subsequence. (3) Suppose that (X,d) is complete and Y S X is closed in (X,d). Then the space (Y,dlyxy) is complete....
Please answer all parts.
(2) (a) Give an example of sequences (sn) and (tn) such that lim sn ntoo 0, but the sequence (sntn) does not converge does not converge.) (b) Let (sn) and (tn) be sequences such that lim sn (Prove that it O and (tn пH00 is a bounded sequence. Show that (sntn) must converge to 0. 1 increasing subsequence of it (b) Find a decreasing subsequence of it (3) Consider the sequence an COS (а) Find an...
4. Answer the following questions. Justify your answers. a. Is the Ratio Test always conclusive? If not, give an example of a series for which the Ratio Test is inconclusive. b. Determine if the series En=1 an is convergent or divergent.
B2. (a) Let I denote the interval 0,1 and let C denote the space of continuous functions I-R. Define dsup(f,g)-sup |f(t)-g(t) and di(f.g)f (t)- g(t)ldt (f,g E C) tEI (i) Prove that dsup is a metric on C (ii) Prove that di is a metric on C. (You may use any standard properties of continuous functions and integrals, provided you make your reasoning clear.) 6 i) Let 1 denote the constant function on I with value 1. Give an explicit...
The
questions for the calculusIII
Instructions. Answer each question completely: justify your answers. This assignment is due at 5pm on Wednesday September 25 in Assignment Box #20. 1. Determine if the series given below are convergent. If convergent, calculate the sum of the series. If divergent, justify your answer. 1+23 2 32n n=1 (b) Žlcos(1) (1) § (12 + 3n+3) Suggestion: Use partial fractions. 2. Express this number as a ratio of integers: 2.46 = 2.46464646.. 3. The Fibonacci sequence...
7. Decide whether or not the following situations are possible and justify your answers. (a) (1 point) f: R² + RP is onto. (b) (1 point) f : R² + R is 1-1. (c) (1 point) The set s-{69 69 66 2.69 1 1 is a basis of M3x2(R)? (d) (1 point) The set S= 1 0) (0 ) ( ) ( ) ( ) (0 )} is linearly independent. (e) (1 point) For a linear transformation A : RM...
1. Answer the following questions. Justify your answers. (a) (3
marks) For what values of x does the series 1 + 22x 2 + 24x 4 + 26x
6 · · · + 22nx 2n + · · · converge? (b) (9 marks) Is the following
series absolutely convergent, conditionally convergent or
divergent? i. X∞ n=1 2 √ n − 2 √ n + 1 ii. X∞ n=1 arctan(n) n2 + 1
iii. X∞ k=1 (−1)k k
1. Answer the...
R i 11. Prove the statement by justifying the following steps. Theorem: Suppose f: D continuous on a compact set D. Then f is uniformly continuous on D. (a) Suppose that f is not uniformly continuous on D. Then there exists an for every n EN there exists xn and > 0 such that yn in D with la ,-ynl < 1/n and If(xn)-f(yn)12 E. (b) Apply 4.4.7, every bounded sequence has a convergent subsequence, to obtain a convergent subsequence...
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