The Essex Serpent
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One solution to this is that A = B = 0, but this is the trivial solution from K = 0 and one we ignore since it provides no physical solution to the problem other than the knowledge that 0 = 0, which is not that inspiring of a result.— LibreTexts Chemistry, Physical Chemistry (LibreTexts), 2: The Classical Wave Equation, 2.2: The Method of Separation of Variables
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