2 papers
stat.ME2022
Heuristic Algorithm for Univariate Stratification Problem
José Brito, Gustavo Semaan, Leonardo de Lima +1
In sampling theory, stratification corresponds to a technique used in surveys, which allows segmenting a population into homogeneous subpopulations (strata) to produce statistics w…
math.CO2022
Bounding the sum of the largest signless Laplacian eigenvalues of a graph
Aida Abiad, Leonardo de Lima, Sina Kalantarzadeh +2
We show several sharp upper and lower bounds for the sum of the largest eigenvalues of the signless Laplacian matrix. These bounds improve and extend previously known bounds.