Czabarka Éva: Extremal values of Sackin indices in phylogenetic networks

Several measures of phyloghenetic tree balance are known.
The Sackin index is one of the oldest and most popular measures of these measures.
Recently, extensions of the Sackin index to phylogenetic networks have been proposed in the literature and first results on their statistical properties have been obtained. 
I will present the extremal values and extremal networks for three variants of the Sackin index and various types of phylogenetic network classes.