2 papers
cs.CC2026
Interval number for tournaments in P3-convexity
Idian C. Capozzoli, Yan S. Couto, Enrique Junchaya
We study the complexity of determining the interval numbers of tournaments in the and convexities, denoted by $\overrightarrow{\math…
math.CO2026
Lower Bounds for the Pfaffian Number of Graphs
Enrique Junchaya, Alberto Alexandre Assis Miranda, Cláudio L. Lucchesi
The number of perfect matchings of a -pfaffian graph can be counted by computing a linear combination of the pfaffians of matrices. The pfaffian number of a graph is the…