A simplification in the proof of the non-isomorphismbetween $H^1(\delta )$ and $H^1(\delta ^2)$
 作者： Paul F. X. Müller 作者单位： 1Institut f. Analysis u. Numerik J. Kepler Universität Linz A-4040 Linz, Austria 刊名： Studia Mathematica, 2002, Vol.150 , pp.13-16 来源数据库： Institute of Mathematics Polish Academy of Sciences DOI： 10.4064/sm150-1-2 原始语种摘要： The proof that $H^1(\delta )$ and $H^1(\delta ^2)$ are not isomorphic is simplified. This is done by giving a new and simple proof to a martingale inequality of J. Bourgain.

• simplification　简化
• delta　三角洲
• and
• proof　证明
• giving　给予物
• simple　单纯的
• isomorphic　同形的
• martingale　弓形拉线
• simplified　简化的
• inequality　不等式