In 1952 Sholander formulated an axiomatic characterization of the interval function of a tree with a partial proof. In 2011 Chvátal et al. gave a completion of this proof. In this paper we present a characterization of the interval function of a block graph using axioms on an arbitrary transit function R. From this we deduce two new characterizations of the interval function of a tree.

, , ,
doi.org/10.1016/j.disc.2015.01.004, hdl.handle.net/1765/85999
Discrete Mathematics
Department of Econometrics

Balakrishnan, K., Changat, M., Lakshmikuttyamma, A. K., Mathew, J., Mulder, M., Narasimha-Shenoi, P. G., & Narayanan, N. (2015). Axiomatic characterization of the interval function of a block graph. Discrete Mathematics, 338(6), 885–894. doi:10.1016/j.disc.2015.01.004