Theorems in analysis | Fourier analysis | Inequalities

Wirtinger's inequality for functions

In mathematics, historically Wirtinger's inequality for real functions was an inequality used in Fourier analysis. It was named after Wilhelm Wirtinger. It was used in 1904 to prove the isoperimetric inequality. A variety of closely related results are today known as Wirtinger's inequality. (Wikipedia).

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Related pages

Poincaré inequality | Isoperimetric inequality | If and only if | Mathematics | Inequality (mathematics) | Parseval's identity | Periodic function | Fourier analysis