[45] Find all equilibria of the given nonlinear system of differential equations, construct the linear approximating system near each equilibrium, identify the type of each equilibrium, and determine whether each equilibrium is stable, asymptotically stable, or unstable with respect to the nonlinear system. (4-x₁ - x₂)x₁, −²+²+3, (a) (b) dx₁ dt dr₁ dt = dx₂ dt dx₂ dt =(−2+x₁)x₂ = −11+ 2x₂

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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[45] Find all equilibria of the given nonlinear system of differential equations, construct the
linear approximating system near each equilibrium, identify the type of each equilibrium,
and determine whether each equilibrium is stable, asymptotically stable, or unstable with
respect to the nonlinear system.
(a)
(b)
dx₁
dt
dx₁
dt
=
=
(4- x₁-x₂)x1,
-x² + x² +3,
dx₂
dt
dx2
dt
= (-2+x₁)x₂
= -x1 + 2x₂
0
[45] (a) Three equilibria: (₁, ₂) = (0,0), (₁, ₂) = (4,0), and (₁, ₂) = (2,2).
The linear approximating system
The equilibrium (0,0) is a saddle and is unstable.
near (0,0): [2] = [622] [22]
-2
The linear approximating system near (4,0): []=[
-2
-
1
The equilibrium (4,0) is a saddle and is unstable.
The linear approximating system near (2, 2):
The equilibrium (2, 2) is an attractive spiral focus and is asymptotically stable.
(b) Two equilibria: (₁,₂)=(2, 1) and (T₁, T₂) = (-2,-1).
3][2 21.
I'₂
2
0
1₂ - 2
The linear approximating system near (2,1): [2] = [
-1
The equilibrium (2, 1) is a saddle and is unstable.
The linear approximating system near (-2,-1):
The equilibrium (-2, -1) is a repulsive improper node and is unstable.
-4
0
-4 2
2
-
1+1
2
=
[-2].
-1
Il
I2
-2
[B]-[(4-363]
2
+2
+
Transcribed Image Text:[45] Find all equilibria of the given nonlinear system of differential equations, construct the linear approximating system near each equilibrium, identify the type of each equilibrium, and determine whether each equilibrium is stable, asymptotically stable, or unstable with respect to the nonlinear system. (a) (b) dx₁ dt dx₁ dt = = (4- x₁-x₂)x1, -x² + x² +3, dx₂ dt dx2 dt = (-2+x₁)x₂ = -x1 + 2x₂ 0 [45] (a) Three equilibria: (₁, ₂) = (0,0), (₁, ₂) = (4,0), and (₁, ₂) = (2,2). The linear approximating system The equilibrium (0,0) is a saddle and is unstable. near (0,0): [2] = [622] [22] -2 The linear approximating system near (4,0): []=[ -2 - 1 The equilibrium (4,0) is a saddle and is unstable. The linear approximating system near (2, 2): The equilibrium (2, 2) is an attractive spiral focus and is asymptotically stable. (b) Two equilibria: (₁,₂)=(2, 1) and (T₁, T₂) = (-2,-1). 3][2 21. I'₂ 2 0 1₂ - 2 The linear approximating system near (2,1): [2] = [ -1 The equilibrium (2, 1) is a saddle and is unstable. The linear approximating system near (-2,-1): The equilibrium (-2, -1) is a repulsive improper node and is unstable. -4 0 -4 2 2 - 1+1 2 = [-2]. -1 Il I2 -2 [B]-[(4-363] 2 +2 +
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