Ultradistribution

In functional analysis, an ultradistribution (also called an ultra-distribution) is a generalized function that extends the concept of a distributions by allowing test functions whose Fourier transforms have compact support. They form an element of the dual space ๐’ตโ€ฒ, where ๐’ต is the space of test functions whose Fourier transforms belong to ๐’Ÿ, the space of infinitely differentiable functions with compact support.

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Ultradistribution

In functional analysis, an ultradistribution (also called an ultra-distribution) is a generalized function that extends the concept of a distributions by allowing test functions whose Fourier transforms have compact support. They form an element of the dual space ๐’ตโ€ฒ, where ๐’ต is the space of test functions whose Fourier transforms belong to ๐’Ÿ, the space of infinitely differentiable functions with compact support.

Source: Wikipedia "Ultradistribution" ยท CC BY-SA 4.0

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