Cyclically covering subspaces in F 2 n
Cyclically covering subspaces in F 2 n
复制标题
循环覆盖 F 2 n 中的子空间
DOI:
10.1016/j.jcta.2021.105436
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Aaronson J
中科院分区:
文献类型:
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作者:
Aaronson J
A subspace of F 2 n is called cyclically covering if every vector in F 2 n has a cyclic shift which is inside the subspace. Let h 2 (n) denote the largest possible codimension of a cyclically covering subspace of F 2 n. We show that h 2 (p)= 2 for every prime p such that 2 is a primitive root modulo p, which, assuming Artin's conjecture, answers a question of Peter Cameron from 1991. We also prove various bounds on h 2 (a b) depending on h 2 (a) and h 2 (b) and extend some of our results to a more general set-up proposed by Cameron, Ellis and Raynaud.