Consider a system of two nonlinear first-order ODEs, where x and y are functions of the independent variable t: * = 2 tanh (x) - 2x cos(y) +e+³y - 1, y = 3 cosh(x) - 3ey + 29 y+sin(x). (a) Write down in matrix form of the type X = AX with X = (x, y)T the system obtained by linearisation of the above equations around the point x = y = 0. Specify the elements of the matrix A. (b) Find the eigenvalues and eigenvectors of the matrix A obtained in (a). Write down the general solution of the linear system. (c) What type of fixed point is the equilibrium solution x = y = 0? Sketch the phase portrait of the linear system.
Consider a system of two nonlinear first-order ODEs, where x and y are functions of the independent variable t: * = 2 tanh (x) - 2x cos(y) +e+³y - 1, y = 3 cosh(x) - 3ey + 29 y+sin(x). (a) Write down in matrix form of the type X = AX with X = (x, y)T the system obtained by linearisation of the above equations around the point x = y = 0. Specify the elements of the matrix A. (b) Find the eigenvalues and eigenvectors of the matrix A obtained in (a). Write down the general solution of the linear system. (c) What type of fixed point is the equilibrium solution x = y = 0? Sketch the phase portrait of the linear system.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Consider a system of two nonlinear first-order ODEs, where x and y are functions of the
independent variable t:
sin(x).
(a) Write down in matrix form of the type X = AX with X = (x, y)T the system.
obtained by linearisation of the above equations around the point x = y = 0.
Specify the elements of the matrix A.
* = 2 tanh(x) - 2x cos(y) + ex+3y - 1, y = 3 cosh(x) - 3ey +
2y +
(b) Find the eigenvalues and eigenvectors of the matrix A obtained in (a). Write
down the general solution of the linear system.
(c) What type of fixed point is the equilibrium solution x = y = 0? Sketch the phase
portrait of the linear system.
(d) Find the solution of the linear system corresponding to the initial conditions
x(0) = 1, y(0) = 0. Determine the values limt→∞ x(t) and lim y(t).
8x
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