关于多维Beurling-Ahlfors算子的范数
On the norm of the Beurling-Ahlfors operator in several dimensions
摘要:
当p>2时,n元广义Beurling-Ahlfors变换的Lp算子范数至多为(n/2+1)(p-1).这改进了所有维度n>2的早期结果。证明是基于热扩展,并依赖于底部的伯克霍尔德的尖锐不等式的鞅变换。
英文摘要:
The Lp operator norm of the generalized Beurling-Ahlfors transformation in n variables is at most (n/2+1)(p-1) for p>2. This improves on earlier results in all dimensions n>2. The proof is based on the heat extension and relies at the bottom on Burkholder's sharp inequality for martingale transforms.
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