Exterior algebras and two conjectures on finite abelian groups

Details Exterior algebras and two conjectures on finite abelian groups Exterior algebras and two conjectures on finite abelian groups

2008-08-20

arxiv.org/abs/0808.2753v4

Israel J. Math. 182(2011), 425-437

Mathematics

Group Theory

10 pages

Scientific paper

Let G be a finite abelian group with |G|>1. Let a_1,...,a_k be k distinct elements of G and let b_1,...,b_k be (not necessarily distinct) elements of G, where k is a positive integer smaller than the least prime divisor of |G|. We show that there is a permutation $\pi$ on {1,...,k} such that a_1b_{\pi(1)},...,a_kb_{\pi(k)} are distinct, provided that any other prime divisor of |G| (if there is any) is greater than k!. This in particular confirms the Dasgupta-Karolyi-Serra-Szegedy conjecture for abelian p-groups. We also pose a new conjecture involving determinants and characters, and show that its validity implies Snevily's conjecture for abelian groups of odd order. Our methods involve exterior algebras and characters.

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