C. Y. Ku

activity

20082025

D

-graphs for Nonzero Roots of the Matching Polynomial

3 citations · 4 across the 16 of their papers we have counts for

collaborators

Showing 2013Show all

2 papers · 1 filter

math.CO2013

A generalization of the extremal function of the Davenport-Schinzel sequences

Kok Bin Wong, Cheng Yeaw Ku

Let $[n] = {1, \dots, n}$ . A sequence $u = a_{1} a_{2} \dots a_{l}$ over $[n]$ is called $k$ -sparse if $a_{i} = a_{j}$ , $i > j$ implies $i - j \geq k$ . In other words, every consecutive subsequenc…

math.CO2013

An Analogue of the Hilton-Milner Theorem for weak compositions

Kok Bin Wong, Cheng Yeaw Ku

Let $N_{0}$ be the set of non-negative integers, and let $P (n, l)$ denote the set of all weak compositions of $n$ with $l$ parts, i.e., $P(n,l)=\{ (x_1,x_2,\dots, x_l)\in\math…