2012/04/06 by Gainer, Andrew
#Combinatorics (math.CO) #FOS: Mathematics
paper · doi:10.48550/arxiv.1204.1402
The theory of Γ-species is developed to allow species-theoretic study of quotient structures in a categorically rigorous fashion. This new approach is then applied to two graph-enumeration problems which were previously unsolved in the unlabeled case-bipartite blocks and general k-trees.