i. Find all critical points (equilibria). ii. Determine the linearized system for each of the points in (i.). Classify each of the critical points (equilibria). If the critical points are not spirals or centers, find all eigenvectors. iii. Sketch the global phase portrait. Include the eigenvectors for the linearized system at each critical point and draw arrowws on the solution curves to indicate the direction of flow. a) x' = x² – x + y, y' = 2x² – 2x %3D

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Exercise 8.2.52: For the systems below:
i. Find all critical points (equilibria).
ii. Determine the linearized system for each of the points in (i.). Classify each of the critical
points (equilibria). If the critical points are not spirals or centers, find all eigenvectors.
iii. Sketch the global phase portrait. Include the eigenvectors for the linearized system at each
critical point and draw arrows on the solution curves to indicate the direction of flow.
a) x' = x² – x + y, y' = 2x² – 2x
8.2. STABILITY AND CLASSIFICATION OF ISOLATED CRITICAL POINTS
277
b) x' = –3x + y, y' = -y + x²
%D
c) x' = -x + y², y' = x + 2y
d) x' = 2x + y, y' = -y + x²
I
e) x' = y2 – 1, y' = x3 – 1
%3D
%3D
-
f) x' = 3y² – 3y + x, y' = y² – y
%3D
Transcribed Image Text:Exercise 8.2.52: For the systems below: i. Find all critical points (equilibria). ii. Determine the linearized system for each of the points in (i.). Classify each of the critical points (equilibria). If the critical points are not spirals or centers, find all eigenvectors. iii. Sketch the global phase portrait. Include the eigenvectors for the linearized system at each critical point and draw arrows on the solution curves to indicate the direction of flow. a) x' = x² – x + y, y' = 2x² – 2x 8.2. STABILITY AND CLASSIFICATION OF ISOLATED CRITICAL POINTS 277 b) x' = –3x + y, y' = -y + x² %D c) x' = -x + y², y' = x + 2y d) x' = 2x + y, y' = -y + x² I e) x' = y2 – 1, y' = x3 – 1 %3D %3D - f) x' = 3y² – 3y + x, y' = y² – y %3D
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