6. Express solutions of the following in terms of the special functions defined in lectures [do n...
6. Express solutions of the following in terms of the special functions defined in lectures [do not derive these solutions]: (a) (1-2)y" - 2ry n(n+ 1)y 0, -1S1, write down the solution that satisfies the boundary conditions y(-1) = (-1)", y(1) = 1; to sin θ + n (n + 1)7-0 0 θ π, write down the general solution and then the solution sin 0 dø Sin 0 that is bounded forve e [0, π] and 2r-periodic with respect to...
+ (3) ar2 2. Recall from lectures that the governing PDE for vibrations of a circular drum lid is 1 au 1 ay c? + 012 72 302 for r € (0,R), 0€ (-2,7), and t > 0, and the boundary condition is (R, 6,t) = 0 for t>0 and -150<7. rar (4) You will search for a solution of the form v(r,0,t) = G(r) sin(30) cos(w t), (5) for a function G that satisfies the ODE m2 G" +rG'...
(15 pts) Bessel functions and the vibration of a circular drum In polar coordinates, the Laplacian is just like the Laplacian for the cylinder, but with the removed part เอ The structure of the Laplacian is what we call separable because the r and 0 terms are separate this allows us to solve certain physics problems on the disc by searching for solutions of the form f(r,0)-ar)b() The vibration of a circular drum head is described by 02t where u...
1. (a) Write the following two functions in terms of , and say where they are holomorphic: i. x2 + y2 - y - 2+ ix ii. (x + 7txt) +i(y-2) (b) Show that the function f(x) = eri-y (cos(2«ry)+isin(2xy)) is entire, and find its deriva- tive. Write it in terms of .
7. Consider the boundary value problem for the Laplace equation on the strip u(0, y) u(n,y)=0, = a. Explain why it makes sense to look for a solution of the form b. Find all solutions of the form u(x,y) = Σ Yn (y) sin nx satisfying c. Among the solutions you found in part (b) find the unique solution u (x, y) = Σ Y, (y) sin na. the Laplace equation and the boundary conditions. (i.e. find Yn (y).) that...
Consider the boundary value problem (12")=-45+4 with (2)=5 and u(6)=-1 Find the functions g., and , so that y = 9+Q81+ay, is the approximate quadratic solution that satisfies the essential boundary condition. Your answer should consist of three expressions, the first representing the term g, the second representing the term , and the third representing the term og. All three expressions should be expressed in terms of the independent variable x. Your answers should be expressed as a function of...
# 4: For smooth complex valued functions f(x), g(z) defined for 0 < x inner product<f(x),g(x) > by 2π define the Hermitian Introduce the operator D(f() a)Show that <D(f(x),9()), D(g(x)) > if f b) For n and integer show that einz for 0-x-2n satisfi c) Show that for mメn both integers then < einz, enny-0, 0,警) (0)- ic boundary conditions. Also onormal and < einz, einz >-2T. θ, Call these last periodic boundary conditions for f(x), g(s), show that D(einz)...
Q1 Write the following function in terms of unit step functions. Hence, find its Laplace transform 10<tsI g(t) = le-3, +1 , 1<t 2 .22 Q2 Use Laplace transform to solve the following initial value problem: yty(o)-0 and y (0)-2 A function f(x) is periodic of period 2π and is defined by Q3 Sketch the graph of f(x) from x-2t to2 and prove that 2sinh π11 f(x)- Q4 Consider the function f(x)=2x, 0<x<1 Find the a Fourier cosine series b)...
Consider the generalized integrator function (2) discussed in class, defined by its proper- ties: | dr 8(x) = 1, Ve > 0, | dx 8(x) = 12+ = ſo if r* <0 11 if x* 20' dx 8(2 – c)f(x) = f(c), VER, where dc 8() is understood as a slight abuse of notation and f(x) in the last formula is a suitably well-behaved (at least bounded and continuous - and perhaps even smoother- in a neighborhood of x=c) function...
. (a) Find the general solution to the following differential equations. Express your answer in terms of Bessel functions of the first and second kinds (just as we did in assignments, do not write the asnwers as series expansions of Bessels functions). Please explain how you arrived at your answer. (b) Please start with separation of variables and completely solve the heat flow problem. 2 Ll ot u(0, t) u(2, t)=0 = -(ま 1, 0<<1 . (a) Find the general...