Mathematics For Machine Technology
8th Edition
ISBN: 9781337798310
Author: Peterson, John.
Publisher: Cengage Learning,
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Chapter 20, Problem 31A
To determine
The unknown value and verify the result.
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5. (a) State the Residue Theorem. Your answer should include all the conditions required
for the theorem to hold.
(4 marks)
(b) Let y be the square contour with vertices at -3, -3i, 3 and 3i, described in the
anti-clockwise direction. Evaluate
に
dz.
You must check all of the conditions of any results that you use.
(5 marks)
(c) Evaluate
L
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ཙ
x sin(Tx)
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da.
(11 marks)
3. (a) Lety: [a, b] C be a contour. Let L(y) denote the length of y. Give a formula
for L(y).
(1 mark)
(b) Let UCC be open. Let f: U→C be continuous. Let y: [a,b] → U be a
contour. Suppose there exists a finite real number M such that |f(z)| < M for
all z in the image of y. Prove that
<
||, f(z)dz| ≤ ML(y).
(3 marks)
(c) State and prove Liouville's theorem. You may use Cauchy's integral formula without
proof.
(d) Let R0. Let w € C. Let
(10 marks)
U = { z Є C : | z − w| < R} .
Let f UC be a holomorphic function such that
0 < |ƒ(w)| < |f(z)|
for all z Є U. Show, using the local maximum modulus principle, that f is constant.
(6 marks)
3. (a) Let A be an algebra. Define the notion of an A-module M. When is a module M
a simple module?
(b) State and prove Schur's Lemma for simple modules.
(c) Let AM(K) and M = K" the natural A-module.
(i) Show that M is a simple K-module.
(ii) Prove that if ƒ € Endд(M) then ƒ can be written as f(m) = am, where a
is a matrix in the centre of M, (K).
[Recall that the centre, Z(M,(K)) == {a Mn(K) | ab
M,,(K)}.]
= ba for all bЄ
(iii) Explain briefly why this means End₁(M) K, assuming that Z(M,,(K))~
K as K-algebras.
Is this consistent with Schur's lemma?
Chapter 20 Solutions
Mathematics For Machine Technology
Ch. 20 - Use a decimal equivalents table to find the...Ch. 20 - Compute (27.52.5+4.36)21.75 . Express the result...Ch. 20 - A cylinder has a volume, V, of 32.85 mm3. Use the...Ch. 20 - The volume V of a cube is V=s3 , where s is the...Ch. 20 - Multiply 15.328.75 .Ch. 20 - Express the decimal fraction 0.4275 as a common...Ch. 20 - Prob. 7ACh. 20 - Express the following ratios in lowest fractional...Ch. 20 - Prob. 9ACh. 20 - Express the following ratios in lowest fractional...
Ch. 20 - Prob. 11ACh. 20 - Prob. 12ACh. 20 - Prob. 13ACh. 20 - Express the following ratios in lowest fractional...Ch. 20 - Prob. 15ACh. 20 - Express the following ratios in lowest fractional...Ch. 20 - Length A in Figure 205 is 3 inches and length B is...Ch. 20 - Prob. 18ACh. 20 - Prob. 19ACh. 20 - In Figure 208, gear A is turning at 120...Ch. 20 - Solve for the unknown value in each of the...Ch. 20 - Solve for the unknown value in each of the...Ch. 20 - Prob. 23ACh. 20 - Prob. 24ACh. 20 - Prob. 25ACh. 20 - Prob. 26ACh. 20 - Prob. 27ACh. 20 - Solve for the unknown value in each of the...Ch. 20 - Solve for the unknown value in each of the...Ch. 20 - Prob. 30ACh. 20 - Prob. 31ACh. 20 - Prob. 32ACh. 20 - Prob. 33ACh. 20 - Prob. 34ACh. 20 - Prob. 35ACh. 20 - Prob. 36ACh. 20 - Prob. 37ACh. 20 - Prob. 38ACh. 20 - Prob. 39ACh. 20 - Prob. 40ACh. 20 - Prob. 41ACh. 20 - Prob. 42ACh. 20 - The proportion AB=CDcompares the sides of two...Ch. 20 - Prob. 44ACh. 20 - It is sometimes impractical to make engineering...Ch. 20 - Prob. 46ACh. 20 - Prob. 47ACh. 20 - A drawing has a scale of 14=3 . Determine the...
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