空间 D_G 被构造,空间 D_G 的一些描述被给。古典 Fourier 被扩大到广义函数空间 D ′ _ G,这被显示出,它能连续地被嵌进 Schwartz 广义函数空间 D ′。它也被看那 D ′ _ Gis 上的 D ′的最大的嵌入的潜水艇空间扩大 Fourier, G,是 D ′ _ G 的同胚到自己上。
A space Df is constructed and some characterizations of space Df are given. It is shown that the classical Fourier transform is extended to the distribution space Df, which can be embedded into the Schwartz distribution space D' continuously. It is also shown that D'f is the biggest embedded subspace of D on which the extended Fourier transform, f, is a homeomorphism of D'f onto itself.