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C9 question 1 typo?

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Qiaochu Yang:
In chapter 9 question 1
(Δ+ω2)u=0
instead of u, should it be v since v satisfies Helmholtz equation?

Jingxuan Zhang:
yes.

Victor Ivrii:
Exactly where?

Qiaochu Yang:

--- Quote from: Victor Ivrii on March 29, 2018, 10:10:29 AM ---Exactly where?

--- End quote ---
http://www.math.toronto.edu/courses/apm346h1/20181/PDE-textbook/Chapter9/S9.P.html problem 1

Victor Ivrii:
OK

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