R. Zhang

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20192026

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2 papers · 1 filter

math.CO2020

$C - (k, ℓ)$ -Sum-Free Sets

Rachel Zhang

The Minkowski sum of two subsets $A$ and $B$ of a finite abelian group $G$ is defined as all pairwise sums of elements of $A$ and $B$ : $A + B = {a + b : a \in A, b \in B}$ . The…

math.CO2019

The Relation between Composability and Splittability of Permutation Classes

Rachel Zhang

A permutation class $C$ is said to be splittable if there exist two proper subclasses $A, B ⊊ C$ such that any $σ \in C$ can be red-blue colored so that the red (respective…

C−(k,ℓ)-Sum-Free Sets

The Relation between Composability and Splittability of Permutation Classes

$C - (k, ℓ)$ -Sum-Free Sets