MAT 3237 Differential Equations Section 4.4 Additional Operational Properties Part I
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Theorem 4.8
Theoretical Background Laplace transforms do not exist for all functions If f(t) satisfy certain “nice conditions”, its Laplace transform exists (Theorem 4.2) Under the same “nice conditions”, interchanging of differentiation and integration is possible (Advanced Calculus/ Analysis)
Theoretical Background Laplace transforms do not exist for all functions If f(t) satisfy certain “nice conditions”, its Laplace transform exists (Theorem 4.2) Under the same “nice conditions”, interchanging of differentiation and integration is possible (Advanced Calculus/ Analysis)
Theoretical Background Laplace transforms do exist for all functions If f(t) satisfy certain “nice conditions”, its Laplace transform exists (Theorem 4.2) Under the same “nice conditions”, interchanging of differentiation and integration is possible (Advanced Calculus/ Analysis)
Theorem 4.8
Proof:
Example 1
Before Example 2….. Rewrite our formula for more complicated situations
Example 2
Next Question… Given functions F(s) and G(s). What is the function h(t) such that
Definition: Convolution
Convolution This type of integrals has many applications in physics and engineering Signal and System Analysis
Convolution
Combining the 2 facts: 2 Forms of Convolution Theorem For Part II……
Example 3
Warning