- #1
paxprobellum
- 25
- 0
Homework Statement
(a) Solve [tex]\frac{\partial u}{\partial t}=k\frac{\partial ^{2} u}{\partial x^{2}} - Gu[/tex]
where -inf < x < inf
and u(x,0) = f(x)
(b) Does your solution suggest a simplifying transformation?
Homework Equations
I used the Fourier transform as:
F[f(x)] = F(w) = [tex] \frac{1}{2*pi} \int_{-inf}^{inf} f(x) e^{iwx} dx [/tex]
The Attempt at a Solution
I solved part a using Fourier transform. Although I'm not 100% certain, I think my answer is pretty plausible. I'm happy to elaborate on how I solved this, but I didn't want to type it all out for naught, because that's not really my question. Anyway, I got:
[tex] u(x,t) = \int_{-inf}^{inf} [ \frac{1}{2*pi} \int _{-inf}^{inf} f(x) e^{iwx} dx ] e^{(-w^{2}k-G)t} e^{-iwx} dw [/tex]
I'm not sure how to answer part b. Any ideas?