标题： 一些关于鞅变换的极值问题。 II 显示英文标题

标题： Some extremal problems for martingale transforms. II

摘要： 本文是论文 arXiv:2401.00053 的直接延续。因此，本文没有重复论文的引言部分和参考文献列表。然而，为了方便读者，本文引用的第一篇论文中的公式在论文末尾的一个特殊附录中收集，并保留了它们的原始编号。在本文中，研究了两种新的局部叶状结构：小口袋和矩形。这种局部叶状结构的出现通过进一步研究边界函数为三次多项式的例子来说明。 显示英文摘要

摘要： This paper is a direct continuation of the paper arXiv:2401.00053. By this reason neither introductory part of the paper nor the list of references are not duplicated. However for the reader convenience, the formulas from the first paper that are cited here are collected in a special addendum at the end of the paper with their original numbers. At this paper two new local foliations are investigated: minor pockets and rectangles. The appearance of such local foliations is illustrated by the further investigation of the examples with the boundary functions being the polynomials of the third degree.