Hankel multiplier transformations and weighted $p$-norms

Hankel multiplier transformations and weighted $p$-norms
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Hankel 乘数变换和加权 $p$-范数

DOI:
10.1090/s0002-9947-1960-0120506-1
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发表时间:
1960
影响因子:
1.3
通讯作者:
Douglas L. Guy
Douglas L. Guy
中科院分区:
数学1区
文献类型:
--
作者:
Douglas L. Guy

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对于f(x)的傅里叶变换,由Fubini定理,我们有熟悉的公式(3)ff * g] A(Y)= fA(Y)gA(Y)。考虑(oc,co)上的函数到(-oo,oo)上的函数的变换T,使得(4)T[f* g] = T[f] * g = f * T[g]。为了表征这样的变换,我们应用(3)并获得T[f]gA =fA T[g]^。因此,存在函数0使得(5)T[f] A(y)= 4(y)fA(y)。另一方面,如果(5)成立,则
for the Fourier transform of f(x), we have the familiar formula (3) ff * g] A (Y) = fA (Y)gA (Y) by Fubini's theorem. Consider a transformation T of functions on (oc, co) to functions on (-oo, oo ) such that (4) T[f* g] = T[f] * g = f * T[g]. In order to characterize such a transformation we apply (3) and obtain T[f]gA =fA T[g]^. It follows that there is a function 0 such that (5) T[f] A(y) = 4(y)fA (y). If, on the other hand, (5) holds, then the transforms of the members of