研究了二维欧氏空间中一类新的混杂构形,即由直线构形和若干个圆组成的混杂构形,这是以往所研究的混杂构形的推广形式.并且利用Hasse图得到了此类混杂构形的相交偏序集的Mobius函数值公式.作为公式的应用,给出了两个具体的例子.
Study on a new kind of mixed arrangements in two-dimensional Euclidean space, that is, the mixed arrangement which is composed of a line arrangement and several circles. These mixed arrangements are the generalizations of the former ones. By making use of Hasse diagram,the Mobius function value formula of the intersection poser of a mixed arrangement is obtained. As an application of this formula,two concrete examples are given.