a) If the initial data uo is a bounded, compactly supported function then show that t lution u satisfies the decay property C |u(t, x)| ≤ f b) If in addition uo has integral zero then show that the solution u satisfies

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Chapter2: Second-order Linear Odes
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Problem 3. Let u be the solution to the heat equation in R+ x R,
(dt - A) u = 0,
u(0, x) = uo
a) If the initial data uo is a bounded, compactly supported function then show that the
solution u satisfies the decay property
C
|u(t, x)| ≤ √√t
b) If in addition uo has integral zero then show that the solution u satisfies
|u(t, x)| ≤
C
t
Transcribed Image Text:Problem 3. Let u be the solution to the heat equation in R+ x R, (dt - A) u = 0, u(0, x) = uo a) If the initial data uo is a bounded, compactly supported function then show that the solution u satisfies the decay property C |u(t, x)| ≤ √√t b) If in addition uo has integral zero then show that the solution u satisfies |u(t, x)| ≤ C t
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