Almost difference sets in nonabelian groups

Almost difference sets in nonabelian groups
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非阿贝尔群中的几乎差集

DOI:
10.1007/s10623-018-0519-9
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发表时间:
2017-09
期刊:
Designs, Codes and Cryptography
影响因子:
--
通讯作者:
Qi Wang
Qi Wang
中科院分区:
其他
文献类型:
--
作者:
Jerod Michel;Qi Wang

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给出了两种新的几乎差分集的构造。第一个是具有(作为子群)的阶(q是奇素数幂)群中的几乎差集的一般构造。这种构造产生了几个无限族的几乎差集,其中许多出现在非贝尔群中。第二种构造给出了4阶二面体群中的绝大多数差集,其中有一个素数。此外,还证明了所得到的无限族几乎差分集产生Cayley图,即Ramanujan图。
We give two new constructions of almost difference sets. The first is a generic construction ofalmost difference sets in certain groups of order(qis an odd prime power) having (as a subgroup. This construction yields several infinite families of almost difference sets, many of which occur in nonabelian groups. The second construction yieldsalmost difference sets in dihedral groups of order 4pwhereis a prime. Moreover, it turns out that some of the infinite families of almost difference sets obtained produce Cayley graphs which are Ramanujan graphs.
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