Let us consider the following problem for the heat equation ôu d’u = 0 in (0,1) ×(0,+∞), ди -(0,t) ди “ (1,t) = 0,t > 0, (1) u(x,0) = sin x,0< x<1. Use the method of separation of variables to solve problem (1).

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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PROBLEM 1
Let us consider the following problem for the heat equation
ди ди
= 0 in (0,1)×(0,+o),
ди
(0,1):
ди
(1,t) = 0,t > 0,
%3D
(1)
|u(x,0) = sin x,0 < x <1.
Use the method of separation of variables to solve problem (1).
PROBLEM 2
Use the method of separation of variables to solve
V³u = 0 in R = (0,1)²,
ди
(x,1) = sin 7x on7,
ду
u = 0 on ôR\y,
(2)
with Y = {(x, y)|0<x<1, y=1}.
Hints: Draw a picture and use the functions cosh and sinh
Transcribed Image Text:PROBLEM 1 Let us consider the following problem for the heat equation ди ди = 0 in (0,1)×(0,+o), ди (0,1): ди (1,t) = 0,t > 0, %3D (1) |u(x,0) = sin x,0 < x <1. Use the method of separation of variables to solve problem (1). PROBLEM 2 Use the method of separation of variables to solve V³u = 0 in R = (0,1)², ди (x,1) = sin 7x on7, ду u = 0 on ôR\y, (2) with Y = {(x, y)|0<x<1, y=1}. Hints: Draw a picture and use the functions cosh and sinh
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