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I PDE, heat equation lambda =,<,> 0 question

  1. Dec 11, 2016 #1
    So I have been studying solving separation of variable, heat equation and came across 2 set of lambda equation.

    zOjJ6G1.png
    and
    GqgLWND.png
    lambda = 0 have the same equation. Is it different?
     
  2. jcsd
  3. Dec 12, 2016 #2

    Ssnow

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    Gold Member

    Hint, answer to this question:what is the simplest function such that ##\frac{d^2}{dx^2}X(x)=0## ?
     
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