INTRACRANIAL GAS CONTAINING EPIDURAL ABSCESS IN A CLOSED TRAUMATIC HEAD INJURY


Strong Converse Inequality for a Spherical Operator

In the paper titled as "Jackson-type inequality on the sphere" (2004), Ditzian introduced a spherical nonconvolution operator , which played an important role in the proof of the well-known ELDER FLOWERS Jackson inequality for spherical harmonics.In this paper, we give the lower bound of approximation by this operator.Namely, we prove that there ar

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