8 citations · 21 across the 11 of their papers we have counts for
Showing 2009Show all
3 papers · 1 filter
cs.DM2009★ 2 cited
Regular Matroids with Graphic Cocircuits
Konstantinos Papalamprou, Leonidas Pitsoulis
We introduce the notion of graphic cocircuits and show that a large class of regular matroids with graphic cocircuits belongs to the class of signed-graphic matroids. Moreover, we…
math.CO2009★ 7 cited
On the representability of totally unimodular matrices on bidirected graphs
L. Pitsoulis, K. Papalamprou, G. Appa +1
Seymour's famous decomposition theorem for regular matroids states that any totally unimodular (TU) matrix can be constructed through a series of composition operations called -…
stat.CO2009★ 8 cited
A Fast Algorithm for Robust Regression with Penalised Trimmed Squares
L. Pitsoulis, G. Zioutas
The presence of groups containing high leverage outliers makes linear regression a difficult problem due to the masking effect. The available high breakdown estimators based on Lea…