Mathematical Methods in the Physical Sciences
3rd Edition
ISBN: 9780471198260
Author: Mary L. Boas
Publisher: Wiley, John & Sons, Incorporated
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Textbook Question
Chapter 14.5, Problem 2P
Verify the formulas (4.3) for the coefficients in a Laurent series. Hint: To get
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A function is defined on the interval (-π/2,π/2) by this multipart rule:
if -π/2 < x < 0
f(x) =
a
if x=0
31-tan x
+31-cot x
if 0 < x < π/2
Here, a and b are constants. Find a and b so that the function f(x) is continuous at x=0.
a=
b= 3
Use the definition of continuity and the properties of limits to show that the function is continuous at the given number a.
f(x) = (x + 4x4) 5,
a = -1
lim f(x)
X--1
=
lim
x+4x
X--1
lim
X-1
4
x+4x
5
))"
5
))
by the power law
by the sum law
lim (x) + lim
X--1
4
4x
X-1
-(0,00+(
Find f(-1).
f(-1)=243
lim (x) +
-1 +4
35
4 ([
)
lim (x4)
5
x-1
Thus, by the definition of continuity, f is continuous at a = -1.
by the multiple constant law
by the direct substitution property
Chapter 14 Solutions
Mathematical Methods in the Physical Sciences
Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...
Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.1 - Find the real and imaginary parts u(x,y) and...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21 . Use the Cauchy-Riemann conditions to...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - 1 to 21. Use the Cauchy-Riemann conditions to find...Ch. 14.2 - Using the definition (2.1) of (d/dz)f(z), show...Ch. 14.2 - Using the definition (2.1) of (d/dz)f(z), show...Ch. 14.2 - Prob. 27PCh. 14.2 - Using the definition (2.1) of (d/dz)f(z), show...Ch. 14.2 - Problem 28 is the chain rule for the derivative of...Ch. 14.2 - Problem 28 is the chain rule for the derivative of...Ch. 14.2 - Problem 28 is the chain rule for the derivative of...Ch. 14.2 - Using the definition of ez by its power series...Ch. 14.2 - Using the definitions of sin...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - Using series you know from Chapter 1, write the...Ch. 14.2 - In Chapter 12, equations (5.1) and (5.2), we...Ch. 14.2 - Prob. 44PCh. 14.2 - Prob. 45PCh. 14.2 - Prob. 46PCh. 14.2 - Prob. 47PCh. 14.2 - Using polar coordinates (Problem 46), find out...Ch. 14.2 - Prob. 49PCh. 14.2 - Using polar coordinates (Problem 46), find out...Ch. 14.2 - Prob. 51PCh. 14.2 - Prob. 52PCh. 14.2 - Using polar coordinates (Problem 46), find out...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - Show that the following functions are harmonic,...Ch. 14.2 - It can be shown that, if u(x,y) is a harmonic...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate the following line integrals in the...Ch. 14.3 - Evaluate C(z3)dz where C is the indicated closed...Ch. 14.3 - 01+2iz2dz along the indicated paths:Ch. 14.3 - In Chapter 6, Section 11, we showed that a...Ch. 14.3 - In finding complex Fourier series in Chapter 7, we...Ch. 14.3 - If f(z) is analytic on and inside the circle z=1,...Ch. 14.3 - If f(z) is analytic in the disk z2, evaluate...Ch. 14.3 - Use Cauchys theorem or integral formula to...Ch. 14.3 - Use Cauchys theorem or integral formula to...Ch. 14.3 - Use Cauchys theorem or integral formula to...Ch. 14.3 - Use Cauchys theorem or integral formula to...Ch. 14.3 - Differentiate Cauchys formula (3.9) or (3.10) to...Ch. 14.3 - Use Problem 21 to evaluate the following...Ch. 14.3 - Use Problem 21 to evaluate the following...Ch. 14.3 - Use Problem 21 to evaluate the following...Ch. 14.4 - Show that the sum of a power series which...Ch. 14.4 - Show that equation ( 4.4 ) can be written as...Ch. 14.4 - For each of the following functions find the first...Ch. 14.4 - For each of the following functions find the first...Ch. 14.4 - For each of the following functions find the first...Ch. 14.4 - For each of the following functions find the first...Ch. 14.4 - For each of the following functions find the first...Ch. 14.4 - For each of the following functions find the first...Ch. 14.4 - For each of the following functions, say whether...Ch. 14.4 - For each of the following functions, say whether...Ch. 14.4 - For each of the following functions, say whether...Ch. 14.4 - For each of the following functions, say whether...Ch. 14.5 - If C is a circle of radius about z0, show that...Ch. 14.5 - Verify the formulas (4.3) for the coefficients in...Ch. 14.5 - Obtain Cauchys integral formula ( 3.9 ) from the...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Find the Laurent series for the following...Ch. 14.6 - Show that rule B is correct by applying it to...Ch. 14.6 - Derive (6.2) by using the limit definition of the...Ch. 14.6 - Prove rule C for finding the residue at a multiple...Ch. 14.6 - Prove rule C by using (3.9). Hints: If f(z) has a...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Prob. 33PCh. 14.6 - Find the residues of the following functions at...Ch. 14.6 - Find the residues of the following functions at...Ch. 14.6 - For complex z,Jp(z) can be defined by the series...Ch. 14.6 - The gamma function (z) is analytic except for...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - The values of the following integrals are known...Ch. 14.7 - In Example 4 we stated a rule for evaluating a...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - Using the rule of Example 4 (also see problem 21),...Ch. 14.7 - (a) By the method of Example 2 evaluate 0dx1+x4....Ch. 14.7 - Use the method of Problem 30(c) to evaluate...Ch. 14.7 - Use the method of Problem 30(c) and the contour...Ch. 14.7 - Evaluate the following integrals by the method of...Ch. 14.7 - Evaluate the following integrals by the method of...Ch. 14.7 - Evaluate the following integrals by the method of...Ch. 14.7 - Evaluate the following integrals by the method of...Ch. 14.7 - (a) Show that epx1+exdx=sinp for 0p1. Hint: Find...Ch. 14.7 - Using the same contour and method as in Problem...Ch. 14.7 - Evaluate e2x/3coshxdx. Hint: Use a rectangle as in...Ch. 14.7 - Evaluate 0xdxsinhx. Hint: First find the to ...Ch. 14.7 - The Fresnel integrals, 0usinu2du and 0ucosu2du,...Ch. 14.7 - If F(z)=f(z)/f(z) (a) show that the residue of...Ch. 14.7 - By using theorem (7.8), show that z3+z2+9=0 has...Ch. 14.7 - The fundamental theorem of algebra says that every...Ch. 14.7 - As in Problem 43 find out in which quadrants the...Ch. 14.7 - As in Problem 43 find out in which quadrants the...Ch. 14.7 - As in Problem 43 find out in which quadrants the...Ch. 14.7 - As in Problem 43 find out in which quadrants the...Ch. 14.7 - As in Problem 43 find out in which quadrants the...Ch. 14.7 - As in Problem 43 find out in which quadrants the...Ch. 14.7 - Use (7.8) to evaluate...Ch. 14.7 - Use (7.8) to evaluate z3dz1+2z4 around z=1.Ch. 14.7 - Use (7.8) to evaluate z3+4zz4+8z2+16dz around the...Ch. 14.7 - Use (7.8) to evaluate Csec2(z/4)dz1tan(z/4), where...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - Find the inverse Laplace transform of the...Ch. 14.7 - In equation (7.18), let u(x) be an even function...Ch. 14.8 - Let f(z) be expanded in the Laurent series that is...Ch. 14.8 - (a) Show that if f(z) tends to a finite limit as z...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Find out whether infinity is a regular point, an...Ch. 14.8 - Prob. 13PCh. 14.8 - Evaluate the following integrals by computing...Ch. 14.8 - Evaluate the following integrals by computing...Ch. 14.8 - Observe that in Problems 14 and 15 the sum of the...Ch. 14.9 - In these problems you should be able to make rough...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - For each of the following functions w=f(z)=u+iv,...Ch. 14.9 - Describe the Riemann surface for w=z3Ch. 14.9 - Describe the Riemann surface for w=zCh. 14.9 - Describe the Riemann surface for w=lnzCh. 14.9 - If w=f(z)=u(x,y)+iv(x,y),f(z) analytic, defines a...Ch. 14.9 - Verify the matrix equation dudv=Jdxdy, where J is...Ch. 14.9 - We have discussed the fact that a conformal...Ch. 14.9 - Compare the directional derivative...Ch. 14.10 - Prove the theorem stated just after (10.2) as...Ch. 14.10 - Assuming from electricity the equations...Ch. 14.10 - A fluid flow is called irrotational if V=0 where...Ch. 14.10 - Let a flat plate in the shape of a quarter-circle,...Ch. 14.10 - Consider a capacitor made of two very large...Ch. 14.10 - Prob. 6PCh. 14.10 - Use the mapping function w=z2 to find the...Ch. 14.10 - Prob. 8PCh. 14.10 - Find and sketch the streamlines for the flow of...Ch. 14.10 - Find and sketch the streamlines for the indicated...Ch. 14.10 - For w=ln[(z+1)/(z1)], show that the images of u=...Ch. 14.10 - Use the results of Problem 11 to solve the...Ch. 14.10 - Let the figure in Problem 12 represent (the cross...Ch. 14.10 - In the figure in Problem 12, let z=1 be a source...Ch. 14.10 - In Problem 14, the streamlines were the images of...Ch. 14.10 - Two long parallel cylinders form a capacitor. (Let...Ch. 14.11 - In Problems 1 and 2, verify that the given...Ch. 14.11 - In Problems 1 and 2, verify that the given...Ch. 14.11 - Liouvilles theorem: Suppose f(z) is analytic for...Ch. 14.11 - Use Liouvilles theorem (Problem 3 ) to prove the...Ch. 14.11 - In Problems 5 to 8, find the residues of the given...Ch. 14.11 - In Problems 5 to $8,$ find the residues of the...Ch. 14.11 - In Problems 5 to 8, find the residues of the given...Ch. 14.11 - In Problems 5 to $8,$ find the residues of the...Ch. 14.11 - In Problems 9 to 10, use Laurent series to find...Ch. 14.11 - In Problems 9 to $10,$ use Laurent series to find...Ch. 14.11 - Find the Laurent series of f(z)=ez/(1z) for z1 and...Ch. 14.11 - Let f(z) be the branch of z21 which is positive...Ch. 14.11 - In Problems 13 and $14,$ find the residues at the...Ch. 14.11 - In Problems 13 and 14, find the residues at the...Ch. 14.11 - In Problem 15 to 20, evaluate the integrals by...Ch. 14.11 - In Problem 15 to 20, evaluate the integrals by...Ch. 14.11 - In Problem 15 to 20, evaluate the integrals by...Ch. 14.11 - In Problem 15 to $20,$ evaluate the integrals by...Ch. 14.11 - In Problem 15 to 20, evaluate the integrals by...Ch. 14.11 - In Problem 15 to $20,$ evaluate the integrals by...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Verify the formulas in Problem 21 to 27 by contour...Ch. 14.11 - Evaluate 0xlnxdx(1+x)2 by using the contour of...Ch. 14.11 - Evaluate 0(lnx)21+x2dx by using the contour of...Ch. 14.11 - Show that PV0cos(lnx)x2+1dx=2cosh(/2) by...Ch. 14.11 - As in Section 7, find out how many roots the...Ch. 14.11 - As in Section 7, find out how many roots the...Ch. 14.11 - As in Section 7, find out how many roots the...Ch. 14.11 - As in Section 7, find out how many roots the...Ch. 14.11 - Show that the Cauchy-Riemann equations [see (2.2)...Ch. 14.11 - Show that a harmonic function u(x,y) is equal at...Ch. 14.11 - A (nonconstant) harmonic function takes its...Ch. 14.11 - Show that a Dirichlet problem (see Chapter 13,...Ch. 14.11 - Use the following sequence of mappings to find the...Ch. 14.11 - Use L13 of the Laplace transform table to find the...Ch. 14.11 - Evaluate by contour integration 0cos2(/2)122d....
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