# 3. Definitions of Stability and Boundedness. (a) Assume x = 0 solves the ODE x'= f(t,x), i.e. assume f(1,0) =0, so that x=0 is an equilibrium solution. Explain what it means for this solution to be stable, giving a very precise definition, and then explain what change is made to this definition to say the zero solution is uniformly stable. (b) Explain what it means in general for all solutions of an ODE to be bounded, and then give the definitions of uniform boundedness and ultimate boundedness.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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#3. Definitions of Stability and Boundedness.
(a) Assume x = 0 solves the ODE x' = f(t, x), i.e. assume f(1,0)=0, so that
x=0 is an equilibrium solution. Explain what it means for this solution to
be stable, giving a very precise definition, and then explain what change is
made to this definition to say the zero solution is uniformly stable.
(b) Explain what it means in general for all solutions of an ODE to be bounded,
and then give the definitions of uniform boundedness and ultimate boundedness.
Transcribed Image Text:#3. Definitions of Stability and Boundedness. (a) Assume x = 0 solves the ODE x' = f(t, x), i.e. assume f(1,0)=0, so that x=0 is an equilibrium solution. Explain what it means for this solution to be stable, giving a very precise definition, and then explain what change is made to this definition to say the zero solution is uniformly stable. (b) Explain what it means in general for all solutions of an ODE to be bounded, and then give the definitions of uniform boundedness and ultimate boundedness.
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