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Q1176 - ArqMath20

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Statements

math-stackexchange-category

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exponential-function

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fourier-transform

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B.79

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arqmath formula id

q_739

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math stackexcange post id

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relevant answers

Defining formula

{| \frac{e^{- i x u} - 1}{u} |}^{2} = \frac{2 - 2 \cos (x u)}{u^{2}} = \frac{4 \sin^{2} (\frac{x u}{2})}{u^{2}} \leq \frac{4 (\frac{x u}{2})^{2}}{u^{2}} = x^{2}

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