Template-Type: ReDIF-Paper 1.0 Author-Name: Balakrishnan, K. Author-Name-Last: Balakrishnan Author-Name-First: Kannan Author-Name: Changat, M. Author-Name-Last: Changat Author-Name-First: Manoj Author-Name: Lakshmikuttyamma, A.K. Author-Name-Last: Lakshmikuttyamma Author-Name-First: Anandavally Author-Name: Mathews, J. Author-Name-Last: Mathews Author-Name-First: Joseph Author-Name: Mulder, H.M. Author-Name-Last: Mulder Author-Name-First: Martyn Title: Axiomatic characterization of the interval function of a block graph Abstract: __Abstract__ 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. Length: 14 Creation-Date: 2014-08-20 File-URL: https://repub.eur.nl/pub/51745/EI2014-17.pdf File-Format: application/pdf Series: RePEc:ems:eureir Number: EI 2014-17 Classification-JEL: C10 Keywords: block graphs, interval function Handle: RePEc:ems:eureir:51745