主要介绍了一类新的超平面构形即类自由构形,并运用Whitney定理得到了n维向量空间中自由构形的特征多项式及区域个数,推广了n维向量空间中自由构形的相关结论.
A new kind of hyperplane arrangements-species free arrangements is defined, extracted the characteristic polynomial and the number of the areas of the species free arrangements in n-dimensional vector space using the Whitney theorem,and popularized the related conclusion of the n free arrangements in n dimensional vector space.