On the base size for the symmetric group acting on subsets
On the base size for the symmetric group acting on subsets
复制标题
关于作用于子集的对称群的基本大小
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
Z. Halasi
中科院分区:
文献类型:
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作者:
Z. Halasi
Let k, n be natural numbers with k ≦ n/2 and let Xn,k denote the set of k-element subsets of {1, 2, … n}. The symmetric group Sn acts in a natural way on the set Xn,k. Motivated by a question of Robert Guralnick, we investigate the size of a minimal base for this action. We give constructions providing a minimal base if n = 2k or if n ≧ k2. We also describe a general process providing a base of size at most c times bigger than the size of a minimal base for some universal constant c