L. Ji

activity

20102023

most citedNew Existence and Nonexistence Results for Strong External Difference Families

4 citations · 9 across the 10 of their papers we have counts for

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3 papers · 1 filter

math.CO2018

Constructions of Augmented Orthogonal Arrays

Xin Wang, Lijun Ji, Yun Li +1

Augmented orthogonal arrays (AOAs) were introduced by Stinson, who showed the equivalence between ideal ramp schemes and augmented orthogonal arrays (Discrete Math. 341 (2018), 299…

math.CO2016★ 4 cited

New Existence and Nonexistence Results for Strong External Difference Families

Jingjun Bao, Lijun Ji, Ruizhong Wei +1

In this paper, we use character-theoretic techniques to give new nonexistence results for $(n, m, k, λ)$ -strong external difference families (SEDFs). We also use cyclotomic classes to…

math.CO2014

The completion of optimal $(3, 4)$ -packings

Jingjun Bao, Lijun Ji

A 3- $(n, 4, 1)$ packing design consists of an $n$ -element set $X$ and a collection of $4$ -element subsets of $X$ , called {\it blocks}, such that every $3$ -element subset of $X$ is co…

Constructions of Augmented Orthogonal Arrays

New Existence and Nonexistence Results for Strong External Difference Families

The completion of optimal (3,4)-packings

The completion of optimal $(3, 4)$ -packings