Abstract
We define and study the windowed Fourier transform associated with the spherical mean operator. We prove the boundedness and compactness of localization operators of this windowed. Next, we establish new uncertainty principles for the Fourier and the windowed Fourier transforms associated with the spherical mean operator. More precisely, we give a Shapiro-type uncertainty inequality for the Fourier transform that is, fors> 0 and {alpha(k)}(k)be an orthonormal sequence in L-2(d nu(n+ 1))
(k=1)Sigma(M)(parallel to vertical bar(r,x)vertical bar(s)alpha(k)parallel to(2)(2),nu(n+1) +parallel to vertical bar(mu,lambda)vertical bar F-s similar to alpha k)parallel to 2,nu n+12 > R(n,s)M1+s/2n+1.
Finally, we prove an analogous inequality for the windowed Fourier transform.