3 papers
math.CO2019
Bipartite Biregular Cages and Block Designs
Gabriela Araujo-Pardo, Alejandra Ramos-Rivera, Robert Jajcay
A bipartite biregular -graph is a bipartite graph of even girth having the degree set and satisfying the additional property that the vertices in the sam…
math.CO2018
New structural results on tetravalent half-arc-transitive graphs
Alejandra Ramos Rivera, Primož Šparl
Tetravalent graphs admitting a half-arc-transitive subgroup of automorphisms, that is a subgroup acting transitively on its vertices and its edges but not on its arcs, are investig…
math.CO2017
Arc Transitive Maps with underlying Rose Window Graphs
Isabel Hubard, Alejandra Ramos-Rivera, Primož Šparl
Let be a map with the underlying graph . The automorphism group induces a natural action on the set of all vertex-edge-face incident triples, called {…