Differential equation using laplace

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SUMMARY

The discussion centers on solving the differential equation f(t)'' - a*f(t) = 0 using the Laplace Transform, with initial conditions f(0) = 0 and f'(0) = 0. The participant concludes that the only solution under these conditions is f(t) = 0, indicating that the problem lacks complexity due to the trivial nature of the solution. The equation's missing terms related to boundary behavior were noted, emphasizing the importance of including all relevant conditions in differential equations.

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  • Understanding of Laplace Transforms
  • Knowledge of differential equations
  • Familiarity with initial conditions in mathematical problems
  • Concept of boundary behavior in differential equations
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  • Study the application of Laplace Transforms in solving non-trivial differential equations
  • Explore the concept of boundary value problems in differential equations
  • Learn about the implications of different initial conditions on solutions
  • Investigate the role of missing terms in differential equations and their effects on solutions
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Students studying differential equations, mathematicians interested in Laplace Transforms, and educators teaching advanced calculus concepts.

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Homework Statement


How do I solve the following differential equation with the Laplace Transform:?
f(t)'' - a*f(t) = 0 (all ICs are equal to zero).



Homework Equations





The Attempt at a Solution



So, I get something like F(s)*(s^2 - a) = 0. I don't know where to go from there.
 
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Your equation is missing terms which correspond to the boundary behavior of f(t). F(s)=0 is not the only solution.
 
Hmmm. If as you say all IC's are 0. f(0)=f'(0)=0. Then f(t)=0 is the only solution. Pretty trivial use of laplace transforms.
 

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